NBA playoffs: Celtics at Cavaliers (6 p.m., ESPN); Lakers at Jazz (8:30 p.m., Ch. 14 and ESPN)
Ghost Whisperer (7 p.m., Ch. 2): Melinda learns family secrets. (Season finale)
Moonlight (8 p.m., Ch. 2): It's the final episode of this series, which CBS canceled.
Battlestar Galactica (8 and 10 p.m., Sci Fi): Humans try to work with their Cylon allies.
Numb3rs (9 p.m., Ch. 2): One of Charlie's colleagues is charged with terrorism. (Season finale)