What to Watch on Sunday: Lancelot saves Merlin

Merlin (8pm, NBC) - Merlin is saved from a magical winged creature by young Lancelot (Santiago Cabrera), and then tries to help Lancelot become a knight in King Arthur's court.

Army Wives (10pm, Lifetime) - Chase comes home early but has difficulty readjusting, and Joan decideds to christen her baby before she's deployed.

Iron Chef America (10pm, Food) - A showdown between New York Chef Sue Torres and Iron Chef Bobby Flay. Judges are Isaac Mizrahi, Mark Bittman, and Isabel Gonzalez.