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NBC is shaping its post-Olympics lineup, announcing premiere dates for shows including Parenthood, The Marriage Ref and The Celebrity Apprentice.

Lauren Graham joins Parenthood

Parenthood, which experienced delays with Lauren Graham's replacement of Maura Tierney, will take Heroes' timeslot (Mondays at 9/8c) starting March 1.

Jerry Seinfeld's new series The Marriage Ref will make its debut on Sunday, March 14 at 8/7c. An hour later, The Celebrity Apprentice will return for its third season, with contestants including Bret Michaels, Sharon Osbourne and Cyndi Lauper.

The ninth season of The Biggest Loser kicks off Tuesday, Jan. 5 at 8/7c.

New Celebrity Apprentice cast revealed

The network also plans to expand Dateline NBC to two hours from January to March.

What do you think of the lineup?