<Li> Michelle Trachtenberg as Lily Lockhart </Li> <P> On March 27, 2013, CBS renewed NCIS: Los Angeles for a fifth season . On February 6, 2013, it was announced that Miguel Ferrer was promoted to series regular for the fifth season of NCIS: Los Angeles . </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> Prod . code </Th> <Th> U.S. viewers (millions) </Th> </Tr> <Tr> <Th> 97 </Th> <Td> </Td> <Td> "Ascension" </Td> <Td> Terrence O'Hara </Td> <Td> Frank Military </Td> <Td> September 24, 2013 (2013 - 09 - 24) </Td> <Td> 501 </Td> <Td> 16.35 </Td> </Tr> <Tr> <Td_colspan="8"> As Deeks and Sam struggle to recover from the traumatic torture they both received at the hands of Isaak Sidorov, the team continues the search for stolen nuclear weapons . </Td> </Tr> <Tr> <Th> 98 </Th> <Td> </Td> <Td> "Impact" </Td> <Td> Jonathan Frakes </Td> <Td> Sara Servi & R. Scott Gemmill </Td> <Td> October 1, 2013 (2013 - 10 - 01) </Td> <Td> 502 </Td> <Td> 15.09 </Td> </Tr> <Tr> <Td_colspan="8"> Hetty contacts operational psychologist Nate Getz to help Sam and Deeks come to terms with the torture both men received at the hands of Isaak Sidorov while the remaining members of the OSP investigate the killings of a former Navy Vice Admiral and a controversial journalist on board a private jet . </Td> </Tr> <Tr> <Th> 99 </Th> <Td> </Td> <Td> "Omni" </Td> <Td> Larry Teng </Td> <Td> Kyle Harimoto </Td> <Td> October 8, 2013 (2013 - 10 - 08) </Td> <Td> 503 </Td> <Td> 14.84 </Td> </Tr> <Tr> <Td_colspan="8"> The team must find who compromised a classified vaccine project from a bio tech company . Meanwhile, Deeks struggles with his emotions upon returning to the field . </Td> </Tr> <Tr> <Th> 100 </Th> <Td> </Td> <Td> "Reznikov, N ." </Td> <Td> Tony Wharmby </Td> <Td> Shane Brennan </Td> <Td> October 15, 2013 (2013 - 10 - 15) </Td> <Td> 504 </Td> <Td> 14.65 </Td> </Tr> <Tr> <Td_colspan="8"> While investigating a kidnapping case of a man who claims to be Callen's father, the team soon find themselves in grave danger . </Td> </Tr> <Tr> <Th> 101 </Th> <Td> 5 </Td> <Td> "Unwritten Rule" </Td> <Td> Larry Teng </Td> <Td> Joseph C. Wilson & Jordana Lewis Jaffe </Td> <Td> October 22, 2013 (2013 - 10 - 22) </Td> <Td> 425 </Td> <Td> 14.92 </Td> </Tr> <Tr> <Td_colspan="8"> Nell joins the team in the field, after they discover that the ransom demand for a former Navy officer's girlfriend, who has been kidnapped, is intelligence information, while Deeks remains unaware that he has broken one of Hetty's rules . </Td> </Tr> <Tr> <Th> 102 </Th> <Td> 6 </Td> <Td> "Big Brother" </Td> <Td> Steven DePaul </Td> <Td> Jordana Lewis Jaffe </Td> <Td> October 29, 2013 (2013 - 10 - 29) </Td> <Td> 506 </Td> <Td> 14.90 </Td> </Tr> <Tr> <Td_colspan="8"> When a joint FBI / CIA / NCIS raid goes bad, the team suspects a mole . It turns out to be the work of a hacker with evidence leading to a 15 - year - old girl . Realizing the girl's hacking program has been stolen, Callen goes undercover at her private school to find out who is responsible . Ultimately the team captures her bogus male friend, who conned away the girl's hack phone long enough to sell the intel . </Td> </Tr> <Tr> <Th> 103 </Th> <Td> 7 </Td> <Td> "The Livelong Day" </Td> <Td> Dennis Smith </Td> <Td> Joe Sachs </Td> <Td> November 5, 2013 (2013 - 11 - 05) </Td> <Td> 505 </Td> <Td> 14.76 </Td> </Tr> <Tr> <Td_colspan="8"> The team along with Homeland Security investigate the death of a security guard who worked at a train yard and they soon discover that they're searching for a mastermind who may be planning to launch a terrorist attack on a train . </Td> </Tr> <Tr> <Th> 104 </Th> <Td> 8 </Td> <Td> "Fallout" </Td> <Td> Diana C. Valentine </Td> <Td> Joseph C. Wilson </Td> <Td> November 12, 2013 (2013 - 11 - 12) </Td> <Td> 507 </Td> <Td> 14.88 </Td> </Tr> <Tr> <Td_colspan="8"> When a nuclear device goes missing, the team jump into action to find it before it falls into the wrong hands, while Hetty realizes that someone from her past has returned, someone who could very well jeopardize her career . Meanwhile, the team plans to do something that could make they lose Hetty if they didn't do it . </Td> </Tr> <Tr> <Th> 105 </Th> <Td> 9 </Td> <Td> "Recovery" </Td> <Td> Paul A. Kaufman </Td> <Td> Gil Grant </Td> <Td> November 19, 2013 (2013 - 11 - 19) </Td> <Td> 508 </Td> <Td> 14.99 </Td> </Tr> <Tr> <Td_colspan="8"> While investigating the death of a Naval officer, Kensi and Deeks go undercover at a rehab center . </Td> </Tr> <Tr> <Th> 106 </Th> <Td> 10 </Td> <Td> "The Frozen Lake" </Td> <Td> John Peter Kousakis </Td> <Td> Dave Kalstein </Td> <Td> November 26, 2013 (2013 - 11 - 26) </Td> <Td> 509 </Td> <Td> 12.32 </Td> </Tr> <Tr> <Td_colspan="8"> Sam and Callen ask a Gurkha for help retrieving a thumb drive . Deeks and Kensi decide to try to find a balance but Kensi is reassigned indefinitely . </Td> </Tr> <Tr> <Th> 107 </Th> <Td> 11 </Td> <Td> "Iron Curtain Rising" </Td> <Td> Tony Wharmby </Td> <Td> Jordana Lewis Jaffe </Td> <Td> December 10, 2013 (2013 - 12 - 10) </Td> <Td> 510 </Td> <Td> 15.24 </Td> </Tr> <Tr> <Td_colspan="8"> Upon discovering that a former Romanian communist leader and suspected war criminal is now living in Los Angeles under a false identity, the team attempt to capture the criminal before he disappears again . Kensi arrives in Afghanistan where she receives her assignment . </Td> </Tr> <Tr> <Th> 108 </Th> <Td> 12 </Td> <Td> "Merry Evasion" </Td> <Td> Karen Gaviola </Td> <Td> Kyle Harimoto </Td> <Td> December 17, 2013 (2013 - 12 - 17) </Td> <Td> 511 </Td> <Td> 15.58 </Td> </Tr> <Tr> <Td_colspan="8"> A senator's daughter is the victim of a home invasion . The team investigate to determine if it was a random crime or a targeted attack due to her father's crackdown on international cyber warfare . Meanwhile, Kensi's holiday spirit changes after she receives a surprise Christmas gift . </Td> </Tr> <Tr> <Th> 109 </Th> <Td> 13 </Td> <Td> "Allegiance" </Td> <Td> Eric Laneuville </Td> <Td> Frank Military & Andrew Bartels </Td> <Td> January 14, 2014 (2014 - 01 - 14) </Td> <Td> 512 </Td> <Td> 15.87 </Td> </Tr> <Tr> <Td_colspan="8"> A federal agent tied to hawala, an ancient system of money transfer, is murdered with the resulting investigation reuniting the team in Los Angeles with Kensi and Granger, who are in Afghanistan . </Td> </Tr> <Tr> <Th> 110 </Th> <Td> 14 </Td> <Td> "War Cries" </Td> <Td> James Hanlon </Td> <Td> R. Scott Gemmill </Td> <Td> February 4, 2014 (2014 - 02 - 04) </Td> <Td> 513 </Td> <Td> 16.30 </Td> </Tr> <Tr> <Td_colspan="8"> When two private military contractors are murdered, the team's investigation leads them back to one of their unsolved cases from the episode, "Impact" with the search bringing them to a suspect who eventually puts one of their own in grave danger while Sam sets up Callen on a blind date . </Td> </Tr> <Tr> <Th> 111 </Th> <Td> 15 </Td> <Td> "Tuhon" </Td> <Td> Christine Moore </Td> <Td> Dave Kalstein </Td> <Td> February 25, 2014 (2014 - 02 - 25) </Td> <Td> 514 </Td> <Td> 13.15 </Td> </Tr> <Tr> <Td_colspan="8"> Sam and Callen search in Mexico for a diplomatic murder suspect . Nate and Deeks assist the pair from Los Angeles . </Td> </Tr> <Tr> <Th> 112 </Th> <Td> 16 </Td> <Td> "Fish Out of Water" </Td> <Td> Terrence O'Hara </Td> <Td> Joe Sachs </Td> <Td> March 4, 2014 (2014 - 03 - 04) </Td> <Td> 515 </Td> <Td> 14.37 </Td> </Tr> <Tr> <Td_colspan="8"> Sam and Callen investigate the explosion of a fish market with the help of an undercover DEA agent, Talia Del Campo (Mercedes Masohn). In Afghanistan, Kensi and Granger are on the case of a helicopter crash . </Td> </Tr> <Tr> <Th> 113 </Th> <Td> 17 </Td> <Td> "Between the Lines" </Td> <Td> Dennis Smith </Td> <Td> Joseph C. Wilson </Td> <Td> March 18, 2014 (2014 - 03 - 18) </Td> <Td> 516 </Td> <Td> 14.21 </Td> </Tr> <Tr> <Td_colspan="8"> The team must find a mole when an undercover agent, later found to be working for the ATF, is killed by a gang . Meanwhile in Afghanistan, Granger is worried when Kensi disappears . </Td> </Tr> <Tr> <Th> 114 </Th> <Td> 18 </Td> <Td> "Zero Days" </Td> <Td> Tony Wharmby </Td> <Td> Andrew Bartels </Td> <Td> March 25, 2014 (2014 - 03 - 25) </Td> <Td> 517 </Td> <Td> 15.54 </Td> </Tr> <Tr> <Td_colspan="8"> The team must investigate when one of Eric's friends is attacked . In Afghanistan, Kensi sees someone from her past . </Td> </Tr> <Tr> <Th> 115 </Th> <Td> 19 </Td> <Td> "Spoils of War" </Td> <Td> Frank Military </Td> <Td> Frank Military </Td> <Td> April 1, 2014 (2014 - 04 - 01) </Td> <Td> 518 </Td> <Td> 15.31 </Td> </Tr> <Tr> <Td_colspan="8"> The team travels to Afghanistan after learning of Kensi's disappearance . </Td> </Tr> <Tr> <Th> 116 </Th> <Td> 20 </Td> <Td> "Windfall" </Td> <Td> Eric A. Pot </Td> <Td> Gil Grant </Td> <Td> April 8, 2014 (2014 - 04 - 08) </Td> <Td> 519 </Td> <Td> 14.37 </Td> </Tr> <Tr> <Td_colspan="8"> The team investigates a marine who had embezzled money . Kensi is forced to stay with Eric after returning from Afghanistan, while Nell is teamed with Deeks . </Td> </Tr> <Tr> <Th> 117 </Th> <Td> 21 </Td> <Td> "Three Hearts" </Td> <Td> Diana C. Valentine </Td> <Td> Dave Kalstein & Kyle Harimoto </Td> <Td> April 15, 2014 (2014 - 04 - 15) </Td> <Td> 520 </Td> <Td> 14.69 </Td> </Tr> <Tr> <Td_colspan="8"> An undercover NCIS agent is taken into custody when he is suspected of working for the smuggler he is supposed to be investigating . Meanwhile, Kensi and Deeks discuss their relationship when she returns to the field . </Td> </Tr> <Tr> <Th> 118 </Th> <Td> 22 </Td> <Td> "One More Chance" </Td> <Td> Tony Wharmby </Td> <Td> David J. North </Td> <Td> April 29, 2014 (2014 - 04 - 29) </Td> <Td> 521 </Td> <Td> 14.83 </Td> </Tr> <Tr> <Td_colspan="8"> A 10 - year - old girl Sam once provided protection detail for in Saudi Arabia goes missing, and he's convinced her disappearance is directly connected to the theft of software for a new unmanned - aerial vehicle being developed by her engineer mother . </Td> </Tr> <Tr> <Th> 119 </Th> <Td> 23 </Td> <Td> "Exposure" </Td> <Td> Robert Florio </Td> <Td> Joseph C. Wilson & Jordana Lewis Jaffe </Td> <Td> May 6, 2014 (2014 - 05 - 06) </Td> <Td> 522 </Td> <Td> 14.11 </Td> </Tr> <Tr> <Td_colspan="8"> An explosion at a military charity event kills a soldier and another man . Thought to be a terrorist attack, the team is tasked to find those responsible . </Td> </Tr> <Tr> <Th> 120 </Th> <Td> 24 </Td> <Td> "Deep Trouble" </Td> <Td> Larry Teng </Td> <Td> R. Scott Gemmill </Td> <Td> May 13, 2014 (2014 - 05 - 13) </Td> <Td> 523 </Td> <Td> 14.85 </Td> </Tr> <Tr> <Td_colspan="8"> The suspicious death of a Navy submarine engineer brings NCIS to the case and along with DEA Agent Talia del Campo . It turns out that a network of Colombian mafia, white supremacists and terrorists, have gotten themselves a submarine and loaded it with ammonium nitrate . Meanwhile Hetty faces heat for the White Ghost incident . The episode ends with Callen and Sam trapped on board a submarine, with two terrorists, while the rest of the team begin searching for them . </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> Prod . code </Th> <Th> U.S. viewers (millions) </Th> </Tr>

When does kensi come back in season 5
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