Friday on TV

NBA playoffs: Celtics at Heat (5 p.m., ESPN); Mavericks at Spurs (7:30 p.m., ESPN); Nuggets at Jazz (8:30 p.m., ESPN2 and FSN)

NFL draft (5:30 p.m., NFL Network; 6 p.m., ESPN): The second and third rounds

College baseball (6 p.m., BYUTV): Utah at BYU

Who Do You Think You Are? (7 p.m., Ch. 5): Susan Sarandon explores her family history.

Smallville (7 p.m., Ch. 30): Chloe discovers who Zod really is.

Stargate Universe (7 and 9 p.m., Syfy): Dr. Rush takes a big risk in an attempt to control the ship's navigation system.

Jamie Oliver's Food Revolution (8 p.m., Ch. 4): In the season finale, everything Jamie has accomplished unravels when he leaves Huntington.

Glee (8 p.m., Ch. 13): Fox repeats the "Power of Madonna" episode that aired Tuesday. So if your DVR cut off the end of the episode (because "American Idol" ran long), here's your chance to see the whole thing.

Merlin (8 and 10 p.m., Syfy): Guinevere is kidnapped.

Miami Medical (9 p.m., Ch. 2): A woman refuses treatment.