Series
Knight Rider: : Mike (Justin Bruening) tells a DEA agent (Maria Menounos) that the plane crash she's investigating was faked and the young federal witness who was aboard has been kidnapped. (8 p.m., WBAL-Channel 11)
American Idol: : The Hollywood round continues. (8 p.m., WBFF-Channel 45)
Criminal Minds: : The team tracks a serial killer who embalms his victims so he can keep them around for a while. Cybill Shepherd guest stars as a suspect's mother. (9 p.m., WJZ-Channel 13)
Lost:: Locke (Terry O'Quinn) tries to stop the island's increasingly violent shifts through time. (9 p.m., WMAR-Channel 2 )
Important Things With Demetri Martin:: Demetri Martin explores the topic of timing on the season premiere of the new comedy. (10:30 p.m., Comedy Central)
Late-Night Guests
The Tonight Show With Jay Leno: : Actress Amy Adams; singer Paula Abdul; Dierks Bentley performs. (11:35 p.m., WBAL-Channel 11)
Late Show With David Letterman: : Actor Joaquin Phoenix; the cover model for the 2009 Sports Illustrated swimsuit edition; Anthony Hamilton performs. (11:35 p.m., WJZ-Channel 13)
z on tv
Look for David Zurawik's Z on TV column in the You & Arts & Entertainment section on Sunday. Read his daily blog at baltimoresun.com/zontv