In the season finale, Cruise, Jess and the gang go on -- you guessed it -- a cruise, placing them in even closer quarters than in their usual landlocked living arrangement. Jess and Nick try to keep things from getting too weird. Fox/Citytv, 8 p.m.
Person of Interest
In the new episode A House Divided, an unknown entity prevents The Machine from revealing full details of a looming catastrophic event, forcing the team to piece together five separate clues to try to understand the full picture. CBS/CTV, 9 p.m.
Pioneers of Television
The season finale, Acting Funny, offers viewers a look inside the processes and techniques employed by great comic actors. Among those whose secrets are revealed are Jonathan Winters, Robin Williams and Tina Fey. PBS, 7 p.m.
George Stroumboulopoulos: Brian Henson
David Letterman: Jon Cryer, Elizabeth Olsen
Jimmy Fallon: Seth Rogen, Coldplay
Jimmy Kimmel: Jon Hamm, Emma Roberts
Craig Ferguson: Richard Ayoade
Seth Meyers: Ellen Page, Lewis Black
Jon Stewart: Peter Schuck
Conan O'Brien: Dave Franco, Hamilton Leithauser