<Li> Maria Bello (Jacqueline Sloane) made her series debut in episode 4, "Skeleton Crew", before her promotion to series regular in episode 5, "Fake It' Til You Make It". </Li> <Li> Pauley Perrette (Abby Sciuto) and Duane Henry (Clayton Reeves) departed the show in episode 22, "Two Steps Back". </Li> <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> 331 </Th> <Td> </Td> <Td> "House Divided" </Td> <Td> Tony Wharmby </Td> <Td> Steven D. Binder </Td> <Td> September 26, 2017 (2017 - 09 - 26) </Td> <Td> 1501 </Td> <Td> 13.29 </Td> </Tr> <Tr> <Th> 332 </Th> <Td> </Td> <Td> "Twofer" </Td> <Td> James Whitmore, Jr . </Td> <Td> Scott Williams </Td> <Td> October 3, 2017 (2017 - 10 - 03) </Td> <Td> 1502 </Td> <Td> 13.50 </Td> </Tr> <Tr> <Th> 333 </Th> <Td> </Td> <Td> "Exit Strategy" </Td> <Td> Terrence O'Hara </Td> <Td> Christopher J. Waild </Td> <Td> October 10, 2017 (2017 - 10 - 10) </Td> <Td> 1503 </Td> <Td> 13.30 </Td> </Tr> <Tr> <Th> 334 </Th> <Td> </Td> <Td> "Skeleton Crew" </Td> <Td> Rocky Carroll </Td> <Td> Jennifer Corbett </Td> <Td> October 17, 2017 (2017 - 10 - 17) </Td> <Td> 1504 </Td> <Td> 12.85 </Td> </Tr> <Tr> <Th> 335 </Th> <Td> 5 </Td> <Td> "Fake It' Til You Make It" </Td> <Td> Thomas J. Wright </Td> <Td> David J. North </Td> <Td> October 24, 2017 (2017 - 10 - 24) </Td> <Td> 1506 </Td> <Td> 13.30 </Td> </Tr> <Tr> <Th> 336 </Th> <Td> 6 </Td> <Td> "Trapped" </Td> <Td> Bethany Rooney </Td> <Td> Brendan Fehily </Td> <Td> October 31, 2017 (2017 - 10 - 31) </Td> <Td> 1505 </Td> <Td> 12.11 </Td> </Tr> <Tr> <Th> 337 </Th> <Td> 7 </Td> <Td> "Burden of Proof" </Td> <Td> Dennis Smith </Td> <Td> Gina Lucita Monreal </Td> <Td> November 7, 2017 (2017 - 11 - 07) </Td> <Td> 1507 </Td> <Td> 13.47 </Td> </Tr> <Tr> <Th> 338 </Th> <Td> 8 </Td> <Td> "Voices" </Td> <Td> Tony Wharmby </Td> <Td> Steven D. Binder </Td> <Td> November 14, 2017 (2017 - 11 - 14) </Td> <Td> 1508 </Td> <Td> 13.08 </Td> </Tr> <Tr> <Th> 339 </Th> <Td> 9 </Td> <Td> "Ready or Not" </Td> <Td> Terrence O'Hara </Td> <Td> Scott Williams </Td> <Td> November 21, 2017 (2017 - 11 - 21) </Td> <Td> 1509 </Td> <Td> 12.54 </Td> </Tr> <Tr> <Th> 340 </Th> <Td> 10 </Td> <Td> "Double Down" </Td> <Td> Alrick Riley </Td> <Td> Christopher J. Waild </Td> <Td> December 12, 2017 (2017 - 12 - 12) </Td> <Td> 1510 </Td> <Td> 12.58 </Td> </Tr> <Tr> <Th> 341 </Th> <Td> 11 </Td> <Td> "High Tide" </Td> <Td> Tony Wharmby </Td> <Td> David J. North & Steven D. Binder </Td> <Td> January 2, 2018 (2018 - 01 - 02) </Td> <Td> 1512 </Td> <Td> 14.10 </Td> </Tr> <Tr> <Th> 342 </Th> <Td> 12 </Td> <Td> "Dark Secrets" </Td> <Td> Bethany Rooney </Td> <Td> George Schenck & Frank Cardea </Td> <Td> January 9, 2018 (2018 - 01 - 09) </Td> <Td> 1511 </Td> <Td> 14.24 </Td> </Tr> <Tr> <Th> 343 </Th> <Td> 13 </Td> <Td> "Family Ties" </Td> <Td> Rocky Carroll </Td> <Td> Brendan Fehily </Td> <Td> January 23, 2018 (2018 - 01 - 23) </Td> <Td> 1513 </Td> <Td> 13.97 </Td> </Tr> <Tr> <Th> 344 </Th> <Td> 14 </Td> <Td> "Keep Your Friends Close" </Td> <Td> Mark Horowitz </Td> <Td> Gina Lucita Monreal </Td> <Td> February 6, 2018 (2018 - 02 - 06) </Td> <Td> 1514 </Td> <Td> 13.90 </Td> </Tr> <Tr> <Th> 345 </Th> <Td> 15 </Td> <Td> "Keep Your Enemies Closer" </Td> <Td> Thomas J. Wright </Td> <Td> Jennifer Corbett </Td> <Td> February 27, 2018 (2018 - 02 - 27) </Td> <Td> 1515 </Td> <Td> 12.45 </Td> </Tr> <Tr> <Th> 346 </Th> <Td> 16 </Td> <Td> "Handle with Care" </Td> <Td> Alrick Riley </Td> <Td> Matthew R. Jarrett & Scott J. Jarrett </Td> <Td> March 6, 2018 (2018 - 03 - 06) </Td> <Td> 1516 </Td> <Td> 12.92 </Td> </Tr> <Tr> <Th> 347 </Th> <Td> 17 </Td> <Td> "One Man's Trash" </Td> <Td> Michael Zinberg </Td> <Td> Scott Williams </Td> <Td> March 13, 2018 (2018 - 03 - 13) </Td> <Td> 1517 </Td> <Td> 13.26 </Td> </Tr> <Tr> <Th> 348 </Th> <Td> 18 </Td> <Td> "Death from Above" </Td> <Td> Rocky Carroll </Td> <Td> Christopher J. Waild </Td> <Td> March 27, 2018 (2018 - 03 - 27) </Td> <Td> 1518 </Td> <Td> 11.94 </Td> </Tr> <Tr> <Th> 349 </Th> <Td> 19 </Td> <Td> "The Numerical Limit" </Td> <Td> Leslie Libman </Td> <Td> David J. North & Steven D. Binder </Td> <Td> April 3, 2018 (2018 - 04 - 03) </Td> <Td> 1519 </Td> <Td> 12.23 </Td> </Tr> <Tr> <Th> 350 </Th> <Td> 20 </Td> <Td> "Sight Unseen" </Td> <Td> Bethany Rooney </Td> <Td> Brendan Fehily </Td> <Td> April 17, 2018 (2018 - 04 - 17) </Td> <Td> 1520 </Td> <Td> 11.58 </Td> </Tr> <Tr> <Th> 351 </Th> <Td> 21 </Td> <Td> "One Step Forward" </Td> <Td> James Whitmore, Jr . </Td> <Td> Gina Lucita Monreal </Td> <Td> May 1, 2018 (2018 - 05 - 01) </Td> <Td> 1521 </Td> <Td> 12.35 </Td> </Tr> <Tr> <Th> 352 </Th> <Td> 22 </Td> <Td> "Two Steps Back" </Td> <Td> Michael Zinberg </Td> <Td> Jennifer Corbett </Td> <Td> May 8, 2018 (2018 - 05 - 08) </Td> <Td> 1522 </Td> <Td> 15.08 </Td> </Tr> <Tr> <Th> 353 </Th> <Td> 23 </Td> <Td> "Fallout" </Td> <Td> Terrence O'Hara </Td> <Td> Story by: Christopher J. Waild Teleplay by: David J. North & Christopher J. Waild </Td> <Td> May 15, 2018 (2018 - 05 - 15) </Td> <Td> 1523 </Td> <Td> 12.71 </Td> </Tr> <Tr> <Th> 354 </Th> <Td> 24 </Td> <Td> "Date with Destiny" </Td> <Td> Tony Wharmby </Td> <Td> George Schenck & Frank Cardea & Scott Williams </Td> <Td> May 22, 2018 (2018 - 05 - 22) </Td> <Td> 1524 </Td> <Td> 12.07 </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 the last episode of ncis air