Tuesday on TV

NBA playoffs: Celtics at Cavaliers (6 p.m., TNT); Spurs at Suns (8 p.m. TNT)

NCIS (7 p.m., Ch. 2): The investigation into a Marine's murder takes a surprising turn.

Dancing With the Stars (7 p.m., Ch. 4): Another pair is eliminated.

Biggest Loser (7 p.m., Ch. 5): Dallas Cowboys QB Tony Romo gives the contestants a pep talk.

American Idol (7 p.m., Ch. 13): The remaining four contestants perform.

90210 (7 p.m, Ch. 30): Navid tells Adrianna how he feels.

NCIS: Los Angeles (8 p.m., Ch. 2): A terrorist escapes from Army custody.

Lost (8 p.m., Ch. 4): Locke's motives are finally explained.

Glee (8 p.m., Ch. 13): Rachel has laryngitis.

The Good Wife (9 p.m., Ch. 2): A winner is declared in the Alicia-Cary contest.

V (9:02 p.m., Ch. 4): A human scientist may have developed a weapon the Visitors fear.

Parenthood (9 p.m., Ch. 5): Zeek moves in with Adam and Kristina.

Justified (11 p.m., FX): Raylan is suspended.