<Tr> <Td_colspan="7"> Joel and Zach help an army man in the field . Charlie and Dawn try to save a hand while Maggie and a really pregnant Alex take their board exams . Something bad happens to Joel whiles he's out with Zach . Alex gives birth . </Td> </Tr> <P> Season 4 episode titles are The Rolling Stones song titles . </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> Can . viewers (millions) </Th> </Tr> <Tr> <Th> 50 </Th> <Td> </Td> <Td> "Sympathy for the Devil" </Td> <Td> James Genn </Td> <Td> Adam Pettle </Td> <Td> September 24, 2015 (2015 - 09 - 24) </Td> <Td> 1.49 </Td> </Tr> <Tr> <Td_colspan="7"> Dr. Alex Reid returns to work, arriving at Hope Zion Hospital with a car crash victim she encountered en route, and she's forced to play nice with new General Surgeon on call, Dr. Patrick Curtis . The day gets even more chaotic when Alex is called away to treat Tom Crenshaw, a convicted murderer brought in for emergency treatment . Meanwhile, Dr. Charlie Harris begins to confront his feelings about the paternity of Alex's child, all while juggling an insistent Dr. Shahir Hamza who is looking for backup on his proposal for a new Alzheimer's study . In the ER, Dr. Zach Miller's patient is admitted with symptoms mirroring those of Ebola--putting himself and Dr. Maggie Lin at risk of exposure to the deadly virus . </Td> </Tr> <Tr> <Th> 51 </Th> <Td> </Td> <Td> "Beasts of Burden" </Td> <Td> John Fawcett </Td> <Td> Patrick Tarr </Td> <Td> October 1, 2015 (2015 - 10 - 01) </Td> <Td> 1.37 </Td> </Tr> <Tr> <Td_colspan="7"> Back from maternity leave for just two days, Dr. Reid is given the privilege of assisting renowned surgeon Dr. Clara Levine . When the protagonist begins to question the senior surgeon's surgical decision she quickly finds herself on the wrong side of the operating table, replaced by the ever - charming and ever - tactful Dr. Patrick Curtis . </Td> </Tr> <Tr> <Th> 52 </Th> <Td> </Td> <Td> "Start Me Up" </Td> <Td> Steve DiMarco </Td> <Td> Noelle Carbone </Td> <Td> October 8, 2015 (2015 - 10 - 08) </Td> <Td> 1.27 </Td> </Tr> <Tr> <Td_colspan="7"> Dr. Alex Reid has to juggle her duties as a new mother and a surgeon when she takes a junior resident under her wing . </Td> </Tr> <Tr> <Th> 53 </Th> <Td> </Td> <Td> "Miss You" </Td> <Td> Peter Stebbings </Td> <Td> Ley Lukins </Td> <Td> October 15, 2015 (2015 - 10 - 15) </Td> <Td> 1.28 </Td> </Tr> <Tr> <Td_colspan="7"> Can Dr. Alex Reid forgive and forget when the man responsible for her deceased brother's drug problem is admitted to the hospital? </Td> </Tr> <Tr> <Th> 54 </Th> <Td> 5 </Td> <Td> "Heart of Stone" </Td> <Td> David Wellington </Td> <Td> Waneta Storms </Td> <Td> October 22, 2015 (2015 - 10 - 22) </Td> <Td> 1.31 </Td> </Tr> <Tr> <Td_colspan="7"> A young motocross rider is diagnosed with leukemia, forcing Dr. Alex Reid to navigate family secrets in order to put her young patient on the road to recovery . </Td> </Tr> <Tr> <Th> 55 </Th> <Td> 6 </Td> <Td> "Rock and a Hard Place" </Td> <Td> Jason Priestley </Td> <Td> Fiona Highet </Td> <Td> October 29, 2015 (2015 - 10 - 29) </Td> <Td> 1.27 </Td> </Tr> <Tr> <Td_colspan="7"> Alex must decide whether or not to use information Charlie gets from a patient's spirit in order to save their life . </Td> </Tr> <Tr> <Th> 56 </Th> <Td> 7 </Td> <Td> "Can't You Hear Me Knocking?" </Td> <Td> T.W. Peacocke </Td> <Td> Tammy Marlowe Johnson </Td> <Td> November 5, 2015 (2015 - 11 - 05) </Td> <Td> N / A </Td> </Tr> <Tr> <Td_colspan="7"> With Dr. Dawn Bell on temporary leave, Dr. Shahir Hamza has taken up the hospital's top post as Interim Chief, bringing Hope Zion Hospital up to his strict standards for care and composure . </Td> </Tr> <Tr> <Th> 57 </Th> <Td> 8 </Td> <Td> "Waiting on a Friend" </Td> <Td> James Genn </Td> <Td> Adam Pettle and Graeme Stewart </Td> <Td> November 12, 2015 (2015 - 11 - 12) </Td> <Td> N / A </Td> </Tr> <Tr> <Td_colspan="7"> The death of a trapeze artist sets off a transplant chain of donors and recipients, leading Alex and Shahir to juggle complications and patients to keep the chain moving . </Td> </Tr> <Tr> <Th> 58 </Th> <Td> 9 </Td> <Td> "Shattered" </Td> <Td> David Wellington </Td> <Td> Malcolm MacRury </Td> <Td> November 26, 2015 (2015 - 11 - 26) </Td> <Td> 1.25 </Td> </Tr> <Tr> <Td_colspan="7"> When a bomb goes off at a local charity run, Hope Zion Hospital receives the majority of the casualties, including some of its own doctors . </Td> </Tr> <Tr> <Th> 59 </Th> <Td> 10 </Td> <Td> "Emotional Rescue" </Td> <Td> Gregory Smith </Td> <Td> Malcolm MacRury </Td> <Td> December 3, 2015 (2015 - 12 - 03) </Td> <Td> 1.21 </Td> </Tr> <Tr> <Td_colspan="7"> In the second half of a two - part episode, Charlie returns to Hope Zion Hospital to find Maggie in jeopardy . In a race against time, Charlie struggles to find out what's wrong with his colleague and friend . Meanwhile, Alex, who's still dealing with her part in treating the bomber, becomes determined to make amends by saving Maggie's last patient Shelby . Along withSydney, who returned to Hope Zion for the case, Alex must convince Shelby and her husband that letting go is sometimes the only thing standing in between you and getting better when complications threaten her leg . In the ER, Dr. Cassie Williams and Dr. Jeremy Bishop help a bereaved father deal with the death of his daughter . </Td> </Tr> <Tr> <Th> 60 </Th> <Td> 11 </Td> <Td> "Shine a Light" </Td> <Td> Peter Wellington </Td> <Td> Patrick Tarr and Fiona Highet </Td> <Td> December 10, 2015 (2015 - 12 - 10) </Td> <Td> 1.16 </Td> </Tr> <Tr> <Td_colspan="7"> When an ice storm strikes the city on Christmas Eve, Alex and Dawn struggle to keep a good Samaritan alive long enough for her family to say goodbye . </Td> </Tr> <Tr> <Th> 61 </Th> <Td> 12 </Td> <Td> "All Down the Line" </Td> <Td> Steve DiMarco </Td> <Td> Jennifer Kassabian </Td> <Td> January 7, 2016 (2016 - 01 - 07) </Td> <Td> 1.13 </Td> </Tr> <Tr> <Td_colspan="7"> When a chef with oral cancer refuses care, Alex must confront her own feelings about the way Dana is handling her treatment . </Td> </Tr> <Tr> <Th> 62 </Th> <Td> 13 </Td> <Td> "Goodbye Girl" </Td> <Td> Peter Stebbings </Td> <Td> Noelle Carbone & Katrina Seville </Td> <Td> January 14, 2016 (2016 - 01 - 14) </Td> <Td> 1.33 </Td> </Tr> <Tr> <Td_colspan="7"> Alex must maintain her professionalism when Kristine lands at Hope Zion Hospital after a drunk - driving accident with baby Luke's blanket . </Td> </Tr> <Tr> <Th> 63 </Th> <Td> 14 </Td> <Td> "You Can't Always Get What You Want" </Td> <Td> Michael Shanks </Td> <Td> Ley Lukins </Td> <Td> January 21, 2016 (2016 - 01 - 21) </Td> <Td> 1.30 </Td> </Tr> <Tr> <Td_colspan="7"> Alex and Jeremy struggle to find the truth when all the symptoms of a permanently ill child point towards his mother as the cause . </Td> </Tr> <Tr> <Th> 64 </Th> <Td> 15 </Td> <Td> "Not Fade Away" </Td> <Td> Gregory Smith </Td> <Td> Waneta Storms </Td> <Td> January 28, 2016 (2016 - 01 - 28) </Td> <Td> 1.27 </Td> </Tr> <Tr> <Td_colspan="7"> To see what his life would be like without his special gift, Charlie treats a superstitious farmer without help from his spirit intel . Zach and Dawn save an injured hiker . </Td> </Tr> <Tr> <Th> 65 </Th> <Td> 16 </Td> <Td> "Torn and Frayed" </Td> <Td> Steve DiMarco and Erica Durance </Td> <Td> Patrick Tarr </Td> <Td> February 4, 2016 (2016 - 02 - 04) </Td> <Td> 1.32 </Td> </Tr> <Tr> <Td_colspan="7"> Alex teams up with Cassie to free a young woman from her abusive husband, while Dawn faces a series of life - threatening complications when a patient's pacemaker malfunctions . </Td> </Tr> <Tr> <Th> 66 </Th> <Td> 17 </Td> <Td> "Anybody Seen My Baby" </Td> <Td> David Wharnsby </Td> <Td> Noelle Carbone </Td> <Td> February 14, 2016 (2016 - 02 - 14) </Td> <Td> 1.21 </Td> </Tr> <Tr> <Td_colspan="7"> After Kristine suffers a stroke, Alex discovers the nurse's past may not be as she remembers, so Alex teams up with Charlie to find a way to bring peace to the already troubled spirit . </Td> </Tr> <Tr> <Th> 67 </Th> <Td> 18 </Td> <Td> "Let Me Go" </Td> <Td> James Genn </Td> <Td> Adam Pettle </Td> <Td> February 14, 2016 (2016 - 02 - 14) </Td> <Td> 1.21 </Td> </Tr> <Tr> <Td_colspan="7"> Charlie's condition proves more dangerous than initially thought, as Alex and Shahir struggle to save his life . </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> Can . viewers (millions) </Th> </Tr>

What episode does charlie come back in saving hope