NCIS (7 p.m., Ch. 2): The team goes after an illegal trucking operation that turns deadly.
The Biggest Loser (7 p.m., Ch. 5): The contestants travel to an Olympic training center in Colorado.
NOVA (7 p.m., Ch. 7): A scientist goes "Extreme Cave Diving."
American Idol (7 p.m., Ch. 13): The Hollywood round begins, and Ellen DeGeneres makes her debut as the new judge.
NCIS: Los Angeles (8 p.m., Ch. 2): An agent is shot during a standoff at a bank.
Lost (8 p.m., Ch. 4): Kate finds herself on the run, while Jack is tasked with something that could endanger a friend's life.
NBA (8:30 p.m., FSN): Jazz at Clippers
The Good Wife (9 p.m., Ch. 2): Alicia's client is accused of murdering his wife; the family awaits the outcome of Peter's appeal.
The Forgotten (9 p.m., Ch. 4): An unidentified man falls from the top of a skyscraper.
Frontline (9 p.m., Ch. 7): A report on changes in the low-cost airline industry since the crash of Continental 3407 in Buffalo, which killed 50 people one year ago,
White Collar (11 p.m., USA): Peter and Neal have to find an art thief before he creates an international incident.