<P> Examiner.com reviewing the season finale wrote, "(Greys) delivered yet another epic and emotional season finale that pushes our characters in challenging new directions". The site added, "Perfect Storm gets 5 out of 5 stars . This storm brought on all kinds of emotional strife and death that truly tests the seasoned doctors and pushes them to their element . They bond together, guiding each other through the dark and as the dust settles from this mayhem, there are casualties of all kinds . The tragedy that leaves us hanging until next fall is one hell of a thrill ride full to the brim with shocks ." </P> <P> The number in the "No. in series" column refers to the episode's number within the overall series, whereas the number in the "No. in season" column refers to the episode's number within this particular season . "U.S. viewers in millions" refers to the number of Americans in millions who watched the episodes live . </P> <Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> U.S. viewers (millions) </Th> </Tr> <Tr> <Th> 173 </Th> <Td> </Td> <Td> "Going, Going, Gone" </Td> <Td> Rob Corn </Td> <Td> Stacy McKee </Td> <Td> September 27, 2012 (2012 - 09 - 27) </Td> <Td> 11.73 </Td> </Tr> <Tr> <Td_colspan="7"> Several months after the plane crash, Callie and Derek are heartbroken when they realize that they have to take Mark off of life support . Cristina has moved to Rochester, Minnesota and Meredith encourages her to get on a plane to Seattle . Alex worries that the new pediatric surgeon will destroy Arizona's program . Frustrated with his past decisions, Owen visits April and offers her her job back . Meanwhile, Meredith's ruthlessness towards her interns earns her the nickname "Medusa". At the end of the episode, it is revealed that Arizona did survive, but had to have her leg amputated by Callie, whom she resents because of it . </Td> </Tr> <Tr> <Th> 174 </Th> <Td> </Td> <Td> "Remember the Time" </Td> <Td> Tony Phelan </Td> <Td> William Harper </Td> <Td> October 4, 2012 (2012 - 10 - 04) </Td> <Td> 10.84 </Td> </Tr> <Tr> <Td_colspan="7"> A flashback to the aftermath of the plane crash recounts how the doctors dealt with the disaster . Meredith accepts what has happened, and wants to move on with her life, while Derek, afraid he won't regain full use of his hand, turns to teaching . Cristina is catatonic, but slowly recovers under Owen's care . Arizona is afraid of losing her leg, but after the infection takes a turn for the worse, Callie is forced to make the decision to amputate . Mark is in critical condition, but takes a turn for the better before falling into a coma . </Td> </Tr> <Tr> <Th> 175 </Th> <Td> </Td> <Td> "Love the One You're With" </Td> <Td> Debbie Allen </Td> <Td> Zoanne Clack </Td> <Td> October 18, 2012 (2012 - 10 - 18) </Td> <Td> 9.69 </Td> </Tr> <Tr> <Td_colspan="7"> Meredith, Derek, Cristina, Callie and Arizona are offered a large amount of money as a settlement deal from the plane's manufacturer, but the decision has to be unanimous . Jackson and April are put in a stressful situation when they're obligated to work together on a case . Cristina warms up to Dr. Thomas . Callie has to convince a young girl (Skyler Day) with a nearly severed foot to postpone her solo sailing trip in order to save her foot . After visiting the hangar where the crashed plane now sits, Derek decides not to accept the settlement and convinces the others as well . Arizona is bitter towards Callie for making the call to cut off her leg . </Td> </Tr> <Tr> <Th> 176 </Th> <Td> </Td> <Td> "I Saw Her Standing There" </Td> <Td> Kevin McKidd </Td> <Td> Austin Guzman </Td> <Td> October 25, 2012 (2012 - 10 - 25) </Td> <Td> 8.76 </Td> </Tr> <Tr> <Td_colspan="7"> Realizing Derek might never perform surgery again, Meredith stops discussing her cases with him in hopes of keeping his spirits up . While Arizona is in the hospital getting a prosthetic leg, Alex and Callie face the consequences of deciding to amputate. Jackson and April continue to have sex together, while Richard asks Catherine Avery to assist him with the surgery of a man whose testicles have grown to great proportions . Cristina starts sleeping with Dr. Parker but stops when she finds out that he has been using her to force Dr. Thomas to retire . </Td> </Tr> <Tr> <Th> 177 </Th> <Td> 5 </Td> <Td> "Beautiful Doom" </Td> <Td> Stephen Cragg </Td> <Td> Jeannine Renshaw </Td> <Td> November 8, 2012 (2012 - 11 - 08) </Td> <Td> 9.26 </Td> </Tr> <Tr> <Td_colspan="7"> Meredith is forced to juggle parenting with work when Derek has a lecture in Boston . On her way to work, she comes across a car accident and rushes to help a woman whose injuries remind her of Lexie . Meredith and Cristina lean on each other and maintain their long - distance friendship . Meredith is adamant about saving her patient's life, despite complications in surgery . Cristina assists Dr. Thomas with a cardiac case, when he suddenly suffers a heart attack during the operation . Following Dr. Thomas' death, Cristina returns to Seattle . </Td> </Tr> <Tr> <Th> 178 </Th> <Td> 6 </Td> <Td> "Second Opinion" </Td> <Td> Chandra Wilson </Td> <Td> William Harper </Td> <Td> November 15, 2012 (2012 - 11 - 15) </Td> <Td> 8.84 </Td> </Tr> <Tr> <Td_colspan="7"> Cristina returns to Seattle Grace . The crash victims meet with the legal team to decide their actions with moving forward with the lawsuit . Alex asks Meredith to sell him her mother's house . Jo works with a patient dubbed "Santa Claus" who constantly vomits over her and realizes he's been misdiagnosed . Callie feels guilty about Derek's botched hand surgery, while Bailey asks Arizona for help on a case . Jackson admits to April that he has feelings for her . The victims of the plane crash find out that the legal team is actually going after the hospital and Owen for their settlement deal . </Td> </Tr> <Tr> <Th> 179 </Th> <Td> 7 </Td> <Td> "I Was Made for Lovin' You" </Td> <Td> Laura Innes </Td> <Td> Peter Nowalk </Td> <Td> November 29, 2012 (2012 - 11 - 29) </Td> <Td> 8.95 </Td> </Tr> <Tr> <Td_colspan="7"> Arizona returns to the hospital and works on a case with Alex and April . Owen feels responsible for the crash after finding out he switched the hospital's airline prior to the crash due to budget cuts . Bailey begins resenting having a Christmas wedding, while she and Cristina work on a patient who needs a liver transplant . April and Jackson have a pregnancy scare but break up when the test is negative . Callie and Jackson research options to fix Derek's hand . Cristina realizes she wants Owen back, but just before telling him, he asks for a divorce . Meredith tells Derek that she is three weeks pregnant, but doesn't want anyone else to know . </Td> </Tr> <Tr> <Th> 180 </Th> <Td> 8 </Td> <Td> "Love Turns You Upside Down" </Td> <Td> Mark Jackson </Td> <Td> Stacy McKee </Td> <Td> December 6, 2012 (2012 - 12 - 06) </Td> <Td> 9.10 </Td> </Tr> <Tr> <Td_colspan="7"> The first - year interns go on their first 24 - hour shift; Meredith tasks her intern, Heather, with calling Derek's family to ask if they would donate a nerve for his hand surgery . Alex and Jo work together on a premature baby whose teen mother abandons her, leading Jo to admit to Alex that she was also abandoned as an infant . Cristina's interns take their rivalry too far and are reprimanded when their negligence almost leads to the death of a patient . Heather finds out that Meredith is pregnant . Derek's sister, Liz (Neve Campbell) comes to Seattle to donate her nerve to Derek . </Td> </Tr> <Tr> <Th> 181 </Th> <Td> 9 </Td> <Td> "Run, Baby, Run" </Td> <Td> Rob Corn </Td> <Td> Debora Cahn </Td> <Td> December 13, 2012 (2012 - 12 - 13) </Td> <Td> 8.17 </Td> </Tr> <Tr> <Td_colspan="7"> With her wedding fast approaching, Bailey enlists April to take care of her patients and asks Meredith, Callie, and Arizona to be her bridesmaids . Meredith and Derek have their first ultrasound . Cristina finds out Owen wants the divorce to avoid being caught in a conflict of interest during the investigation into the crash; after confronting him, they decide to save their relationship . April and Jackson decide to go the wedding with a date, deciding on Shane and Stephanie, respectively . Callie and Jackson operate on Liz and Derek, and Meredith tells Liz about the pregnancy . When Jo cuts too deep during a surgery with Alex, she feels she was set up and complains to Arizona . On their way to the wedding, Richard comforts Bailey when she starts having cold feet, but when Richard gets a call that Adele is in the ER, they are forced to return to the hospital . </Td> </Tr> <Tr> <Th> 182 </Th> <Td> 10 </Td> <Td> "Things We Said Today" </Td> <Td> Ron Underwood </Td> <Td> Austin Guzman </Td> <Td> January 10, 2013 (2013 - 01 - 10) </Td> <Td> 9.34 </Td> </Tr> <Tr> <Td_colspan="7"> As Bailey rushes to save Adele's life, everyone at the wedding wonders where she is . Arizona tells Callie that she wants to try to have sex for the first time since the plane crash . Cristina and Owen debate whether to go through with the divorce, while a motorcycle gang is brought to the hospital after a car accident . Alex and Jo bond over their similar childhoods in foster care . Meredith and Bailey successfully operate on Adele and Bailey returns to her wedding . Richard shows up after the ceremony and when Meredith walks over he tells her that Adele has died from a heart attack . </Td> </Tr> <Tr> <Th> 183 </Th> <Td> 11 </Td> <Td> "The End is the Beginning is the End" </Td> <Td> Cherie Nowlan </Td> <Td> Joan Rater </Td> <Td> January 17, 2013 (2013 - 01 - 17) </Td> <Td> 8.80 </Td> </Tr> <Tr> <Td_colspan="7"> A decision is reached regarding the plane crash case, with the hospital found guilty of negligence, and each of the survivors is awarded $15 million in compensation . Callie decides to throw a celebration dinner . Jackson performs surgery on Sloan's old patient, and has a disagreement with Arizona over the procedure used . In order to train his hand post-surgery, Derek starts playing ping - pong . Grieving over his wife, Richard has withdrawn, causing the doctors around him to worry . Meredith, Richard and Heather work on a patient who eats her hair as a coping mechanism and to deal with the overbearing mother . At Callie's dinner, Meredith reveals that she's pregnant . Meanwhile, at the hospital, Owen finds out that the insurance company won't pay the crash compensation due to a loophole in the contract and the hospital paying for it would result in bankruptcy . </Td> </Tr> <Tr> <Th> 184 </Th> <Td> 12 </Td> <Td> "Walking on a Dream" </Td> <Td> Rob Hardy </Td> <Td> Tia Napolitano </Td> <Td> January 24, 2013 (2013 - 01 - 24) </Td> <Td> 9.01 </Td> </Tr> <Tr> <Td_colspan="7"> Dr. Alana Cahill, a financial advisor, is hired to find ways to save the hospital money . Meredith tries to deal with unpredictable pregnancy hormones while trying to save the life of a pregnant woman in dire need of a new liver . Arizona, Alex, and Cristina operate on a little girl from the hospital's Africa program . Owen helps Arizona deal with phantom leg syndrome as she begins feeling pain in her no longer existing leg . Derek returns to performing surgeries and operates on an old patient with a brain tumor . April is asked out on a date by a paramedic . Meredith faces her fear of flying when she has to fly to Oregon to get a liver for her patient while dealing with her pregnancy hormones . At a staff meeting, Dr. Cahill explains that the only way to help save the hospital from closing its doors is to shut down the ER . </Td> </Tr> <Tr> <Th> 185 </Th> <Td> 13 </Td> <Td> "Bad Blood" </Td> <Td> Steve Robin </Td> <Td> Jeannine Renshaw </Td> <Td> January 31, 2013 (2013 - 01 - 31) </Td> <Td> 8.93 </Td> </Tr> <Tr> <Td_colspan="7"> As a part of streamlining daily operations, Dr. Cahill has new cameras put in the hospital . Derek and April work together to find a way for the hospital to keep the ER open . Meredith, Bailey, and Richard are given a class on a new technique for hernias, only to learn that the new policies put the number of procedures before patients . Dr. Cahill assists Owen with the case of the ER's final patient . Cristina and Leah work on a young man who is critically injured, but is not given a blood transfusion due to his beliefs as a Jehovah's Witness; Leah is reprimanded when she tries to give him blood in an attempt to save his life . Arizona, Callie, and Alex work on a young gymnast who is depressed following her double hip replacement . It is revealed that Dr. Cahill closed the ER because she's finding a buyer for the hospital . </Td> </Tr> <Tr> <Th> 186 </Th> <Td> 14 </Td> <Td> "The Face of Change" </Td> <Td> Rob Greenlea </Td> <Td> Stacy McKee </Td> <Td> February 7, 2013 (2013 - 02 - 07) </Td> <Td> 8.91 </Td> </Tr> <Tr> <Td_colspan="7"> In order to sell the hospital, Dr. Cahill suggests finding a photogenic doctor to be "the face of the hospital" in the advertising campaign to attract prospective buyers . During a date with Matthew, April rides along on a call to help a badly injured boy; with the nearest ER too far away, they secretly bring him back to Seattle Grace . With Dr. Cahill busy showing the hospital to the prospective buyers, Pegasus, April and the other attendings go behind Chief Hunt's back to pull off the surgery . Meanwhile, Callie and Richard go "undercover" to Portland General, another hospital owned by Pegasus, and learn discouraging things about their management practices, leading to Callie proposing a surprising plan . Alex and Jackson operate on a transgender teenager whose father doesn't want him to transition . </Td> </Tr> <Tr> <Th> 187 </Th> <Td> 15 </Td> <Td> "Hard Bargain" </Td> <Td> Tony Phelan </Td> <Td> William Harper </Td> <Td> February 14, 2013 (2013 - 02 - 14) </Td> <Td> 8.57 </Td> </Tr> <Tr> <Td_colspan="7"> The plane - crash victims discuss whether they should buy the hospital, with everyone but Arizona on board . Derek is mortified when he finds that agreeing to be the new face of the hospital is more than he intended . April goes to Jackson for dating advice . Dr. Bailey and Arizona work on the case of a young cancer patient who is in need of a genome mapping procedure, but the procedure is not approved by Owen due to the new budget constraints . The crash victims learn that Pegasus is due to buy the hospital that night and, led by Derek, resort to drastic measures to prevent the sale . </Td> </Tr> <Tr> <Th> 188 </Th> <Td> 16 </Td> <Td> "This Is Why We Fight" </Td> <Td> Jeannot Szwarc </Td> <Td> Austin Guzman </Td> <Td> February 21, 2013 (2013 - 02 - 21) </Td> <Td> 8.75 </Td> </Tr> <Tr> <Td_colspan="7"> Dr. Cahill convinces Pegasus to resubmit their bid; meanwhile, Meredith, Derek, Cristina, Callie, and Arizona meet up with an investor whose capital is needed to buy the hospital . Heather overhears Dr. Cahill saying that Pegasus is buying the hospital only to liquidate its assets and fire the staff . After being turned down due to lack of management experience, Meredith and Cristina work to get Richard and Owen on board, but a second meeting with the investor also goes poorly . Jackson considers moving to Boston, as the news of liquidation plans spreads . After talking with Richard, Catherine offers the Avery Foundation's investment in the hospital, but only if Jackson sits on the Board of Directors, effectively running the hospital . </Td> </Tr> <Tr> <Th> 189 </Th> <Td> 17 </Td> <Td> "Transplant Wasteland" </Td> <Td> Chandra Wilson </Td> <Td> Zoanne Clack </Td> <Td> March 14, 2013 (2013 - 03 - 14) </Td> <Td> 8.20 </Td> </Tr> <Tr> <Td_colspan="7"> The transition to new management has the doctors at each other's throats, with much of the frustration directed at an equally frustrated Jackson, whom many felt should not be on the board due to his youth and lack of management experience . Matters become worse when Owen quits as chief, leaving the OR board in complete disarray when the attendings are all swamped with surgeries . At the board meeting, Jackson proposes that the hospital be renamed "Grey - Sloan Memorial Hospital" and to reopen the ER . </Td> </Tr> <Tr> <Th> 190 </Th> <Td> 18 </Td> <Td> "Idle Hands" </Td> <Td> David Greenspan </Td> <Td> Gabriel Llanas </Td> <Td> March 21, 2013 (2013 - 03 - 21) </Td> <Td> 9.39 </Td> </Tr> <Tr> <Td_colspan="7"> The ER reopens after extensive remodeling and includes new state - of - the - art technology . Meredith worries that something might be wrong with the baby . Cristina is frustrated when her new administrative duties cut into her medical research time . Callie and Arizona work on improving their sex life . Bailey is pushing for the hospital to sponsor her genome sequencing project . Meredith starts "catastrophizing" about potential congentinal defects before she and Derek find out the sex . </Td> </Tr> <Tr> <Th> 191 </Th> <Td> 19 </Td> <Td> "Can't Fight This Feeling" </Td> <Td> Mark Jackson </Td> <Td> Meg Marinis </Td> <Td> March 28, 2013 (2013 - 03 - 28) </Td> <Td> 9.02 </Td> </Tr> <Tr> <Td_colspan="7"> The hospital is overrun by patients following a gas tanker explosion . Owen bonds with a boy whose parents were both injured in the crash . Meredith takes interest in the case of a boy whose mother believes he is more sick than the tests indicate . Callie prepares for her TED conference speech with help from Arizona . Meredith asks Dr. Bailey to map Zola's genetic history and her genome to check for Alzheimer's genetic markers . </Td> </Tr> <Tr> <Th> 192 </Th> <Td> 20 </Td> <Td> "She's Killing Me" </Td> <Td> Nicole Rubio </Td> <Td> Debora Cahn </Td> <Td> April 4, 2013 (2013 - 04 - 04) </Td> <Td> 8.58 </Td> </Tr> <Tr> <Td_colspan="7"> Meredith and Derek update their wills and healthcare directives when Meredith tests positive for several genetic markers of Alzheimer's . The attendings train two Syrian doctors in performing lifesaving surgeries in the field without much modern equipment, anesthesia or electricity . Derek recognizes that Heather has potential for neurosurgery and focuses on teaching her, much to Shane's chagrin . Owen continues to spend time with the boy whose parents are still in critical condition following the gas tanker crash . Bailey finds herself in hot water when several of her patients are found to have a staph infection . </Td> </Tr> <Tr> <Th> 193 </Th> <Td> 21 </Td> <Td> "Sleeping Monster" </Td> <Td> Bobby Roth </Td> <Td> Bronwyn Garrity </Td> <Td> April 25, 2013 (2013 - 04 - 25) </Td> <Td> 8.24 </Td> </Tr> <Tr> <Td_colspan="7"> The CDC comes to the hospital to investigate the post-op infections in Dr. Bailey's patients . Tensions flare when Jackson doesn't side with the rest of the board in supporting Dr. Bailey . Meredith wants Cristina present during her labor . Matthew asks April to give him a second chance . Alex admits to Cristina that he loves Jo . The CDC investigation concludes that the cause of the infection is in the surgical gloves used during Dr. Bailey's surgeries . </Td> </Tr> <Tr> <Th> 194 </Th> <Td> 22 </Td> <Td> "Do You Believe in Magic?" </Td> <Td> Kevin McKidd </Td> <Td> Dan Bucatinsky </Td> <Td> May 2, 2013 (2013 - 05 - 02) </Td> <Td> 8.87 </Td> </Tr> <Tr> <Td_colspan="7"> Despite being cleared by the CDC, Dr. Bailey locks herself in her lab, feeling betrayed by her colleagues . Meredith and Richard operate on a magician's assistant literally sawed in half during a magic trick gone awry. April and Jackson rekindle their friendship . Owen continues to care for Ethan, whose father is still in a coma . Dr. Lauren Boswell, a craniofacial surgeon, works with Arizona and Jackson on a complex case of a baby whose brain is on the outside of his skull . Alex tries to avoid Jo, but she comes to him for help when her boyfriend physically abuses her . </Td> </Tr> <Tr> <Th> 195 </Th> <Td> 23 </Td> <Td> "Readiness is All" </Td> <Td> Tony Phelan </Td> <Td> William Harper </Td> <Td> May 9, 2013 (2013 - 05 - 09) </Td> <Td> 8.97 </Td> </Tr> <Tr> <Td_colspan="7"> A major storm is heading for Seattle and the hospital is preparing for an influx of patients . Alex brings Jo's boyfriend to the hospital after finding him badly beaten; after being treated, Alex threatens him not to report Jo to the police . Matthew proposes to April . Ethan's father wakes up after nine days in a coma, crushing Owen's dreams of adopting Ethan . Meredith falls down a staircase, but the baby is confirmed to be fine . Dr. Bailey is still hesitant to have contact with patients . Following their surgery, Arizona and Dr. Boswell have a close encounter in an on - call room . As the storm rolls in and the power goes out, Meredith goes into labor . </Td> </Tr> <Tr> <Th> 196 </Th> <Td> 24 </Td> <Td> "Perfect Storm" </Td> <Td> Rob Corn </Td> <Td> Stacy McKee </Td> <Td> May 16, 2013 (2013 - 05 - 16) </Td> <Td> 8.99 </Td> </Tr> <Tr> <Td_colspan="7"> The hospital continues to operate despite the power outage . Meredith requires a C - section, which is performed in the dark; the baby is born healthy, but her earlier fall causes serious abdominal bleeding . Alex, Jo and Arizona must deal with chaos when oxygen machines in the NICU stop working . Cristina operates on Richard's patient by listening to his heart in the dark . The ER staff rush to help the passengers of a burning bus . April questions her engagement to Matthew when she believes that Jackson has died in the bus explosion . Alex tells Jo he loves her, she reciprocates, and they begin a relationship . Callie finds out about Arizona's encounter with Dr. Boswell . Cristina breaks up with Owen . Dr. Bailey returns to the OR when she has to perform emergency surgery on Meredith . While trying to fix the emergency generators and restore the lights, Richard is electrocuted due to the water in the basement . </Td> </Tr> </Table> <Tr> <Th> No . overall </Th> <Th> No. in season </Th> <Th> Title </Th> <Th> Directed by </Th> <Th> Written by </Th> <Th> Original air date </Th> <Th> U.S. viewers (millions) </Th> </Tr>

When do they buy the hospital in grey's anatomy