Weekend television

"Sorority Surrogate" 8 tonight Lifetime — A college student becomes a surrogate for a wealthy couple.

"The Real Housewives of Atlanta" 8 p.m. Sunday Bravo — Gregg and Peter are at loggerheads.

"Cosmos" 9 p.m. Sunday Fox— A comet's path is traces on its long plunge toward the sun.

"Resurrection" 9 p.m. Sunday ABC — Bellamy and Maggie look for clues in the local river.

"Drop Dead Diva" 9 p.m. Sunday Lifetime (sixth season debut) — Owen gets a visit from his estranged brother, who is being sued by a strip club.

"The Walking Dead" 9 p.m. Sunday AMC — Daryl is tested by his new crew.

"The Mentalist" 10 p.m. Sunday CBS — Van Pelt gets abducted.