Brit Hume and Peter Jennings join forces to moderate the final debate between Democratic presidential candidates (7 p.m., Fox News) before Tuesday’s New Hampshire primary. The event is sponsored by ABC station WMUR-TV and the Manchester (N.H.) Union Leader newspaper. Chris Wallace will anchor postdebate analysis.

• Fans of “The Apprentice” (8 p.m., CNBC) can now catch repeats of the business reality show on the business network. The first three episodes will air over the next three nights. Starting next week, repeats will air on Thursday nights at 9 p.m.

Tonight’s other highlights

• On two episodes of “Without a Trace” (CBS), a boxer takes a powder (7 p.m.), a missing violinist has a dangerous secret (9 p.m.).
• High school reunions can be murder on “Tru Calling” (7 p.m., Fox).
• A terrorist attempts to flee the country with his young daughter on “Threat Matrix” (7 p.m., ABC).
• Will dates a rich plastic surgeon (guest star Hal Linden) on “Will & Grace” (8 p.m., NBC).
• Hope Lange, who died just last month, stars in the 1957 potboiler “Peyton Place” (8 p.m., Fox Movie Channel).

Late night

Matthew Broderick appears on “Late Show with David Letterman” (10:35 p.m., CBS) … Jay Leno welcomes Dennis Miller, Kim Cattrall and Sheryl Crowe on “The Tonight Show” (10:35 p.m., NBC).