We have five new side-splitting clips from the 30 Rock Season 3 premiere entitled Do-Over, which will air on Thursday, October 30 at 9:30 PM ET. Click below to get your fix of Tina Fey's Liz Lemon with guest star Megan Mullally and more before this new season premieres.

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Liz tries to stop the TGS staff from ruining her chances at adoption when an adoption agency evaluator comes to 30 Rock to see if she would make a good mother. Jack returns from Washington D.C. and starts his job again at GE, only to discover he has been demoted. Jack tries to get his old job and office back from Devon Banks and Kathy Geiss. A feud between Tracy and Jenna wreaks havoc among the TGS staff. Megan Mullally and Will Arnett guest star.