Reaper: : Sam meets the Devil's other son. (8 p.m., WNUV-Channel 54)
Nova: : Photojournalist James Balog and a scientific team disperse cameras in risky, remote locations in the Arctic, Alaska and the Alps to document and record the process of melting glaciers. (8 p.m., MPT-Channel 22)
The Biggest Loser: : NASCAR driver Clint Bowyer participates in a challenge that requires each contestant to pull a car. (9 p.m., WBAL-Channel 11)
The Mentalist: : Patrick (Simon Baker) and the team investigate murders at a corporate retreat hosting rich and powerful clientele. (10 p.m., WJZ-Channel 13)
Presidential news conference: : President Barack Obama's 8 p.m. news conference will be carried live on a number of channels, including CBS, NBC, ABC, Fox, MyNetworkTV, CNN, Fox News and MSNBC.
The Tonight Show with Jay Leno:: Ex-Secretary of State Condoleezza Rice. (11:35 p.m., WBAL-Channel 11)
Late Show with David Letterman:: Mary Tyler Moore. (11:35 p.m., WJZ-Channel 13)