Today on TV

Joan of Arcadia (7 p.m., Ch. 2): Joan defies her mother and goes away with Adam.

Women's gymnastics (7 p.m., Ch. 11): Southern Utah at BYU

Hope & Faith (8 p.m., Ch. 4): Faith submits Hope's name for "Wife Swap," and Hope ends up trading places with a snooty, rich woman (Wynona Judd).

Third Watch (8 p.m., Ch. 5) and Medical Investigation (9 p.m., Ch. 5): In this crossover episode, the doctors from the latter show arrive in New York to investigate a captured jewelry-store thief. The man is AWOL from the Army and displays unusual symptoms of an unknown contagious disease that is spreading fast — and his accomplice is still on the run.

Jonny Zero (8 p.m., Ch. 13): Peta Wilson guest stars as a bounty hunter.

Reba (8 p.m., Ch. 30): Cheyenne starts "seeing" another man.