Undercover Boss: The CEO of a seafood business goes to work as a lowly deckhand in this new episode (8 p.m. CBS).
Who Do You Think You Are? "L.A. Law's" Blair Underwood explores his family history on a new episode of the genealogy series (8 p.m. NBC).
A Gifted Man: Maggie Siff ("Mad Men," "Sons of Anarchy") guest stars on a new episode of the drama (9 p.m. CBS).
Great Performances: The series presents "Memphis," a tale about music and race relations in the 1950s (9 p.m. KOCE).
Gold Rush: The docu-series about modern-day gold miners ends its season (9 p.m. Discovery).
Ghost Adventures: The paranormal series visits purportedly haunted hotels and hospitals in this episode (9 p.m. Travel).
Spartacus: Vengeance: Spartacus (Liam McIntyre) tries to rescue a captive Crixus (Manu Bennett) on a new episode of the sword-and-sandal period drama (10 p.m. Starz).
Actors Unscripted: Hollywood types offer their unvarnished opinions about life in show business in this special (8 p.m. E!).
Savoring Harlem: This new special takes a tasty tour of the New York City neighborhood (8 p.m. Food).
Semper Fi: Always Faithful: This 2011 documentary examines a toxic-chemicals cover-up at the Marine Corps' Camp Lejeune in North Carolina (7 p.m. MSNBC).
The Mechanic: Jason Statham is a no-nonsense hitman in this so-so 2011 remake of the 1972 thriller that starred Charles Bronson (8:25 p.m. Showtime).
Them! There's giant mutant ants in them thar hills in this 1954 creature feature (11:30 p.m. TCM).