Weekend television

"Zero Hour" 8 tonight ABC (series finale) — The fate of the world rests on Hank's shoulders.

"Secret Millionaire" 8 p.m. Sunday ABC (third season debut) — Auntie Anne's Pretzels founder helps sick children and families.

"Drop Dead Diva" 9 p.m. Sunday Lifetime — A pageant contestant is stripped of her crown after she claims the competition is rigged.

"Unforgettable" 9 p.m. Sunday CBS — Carrie works undercover with a team of bank robbers to catch a thief.

"Devious Maids" 10 p.m. Sunday Lifetime — A former student recognizes Marisol, potentially blowing her cover.

"Falling Skies" 10 p.m. Sunday TNT (third season finale) — The 2nd Mass destroys an all-important base.