John Hodgman, Jane Krakowski Photo

From: Photo Flash: First Look - 30 ROCK's 'Mazel Tov, Dummies!' Airing 11/29

'Mazel Tov, Dummies!' - After an encounter with Dennis Duffy (guest star Dean Winters), Liz (Fey) and Criss (Marsden) decide to take drastic measures to start a family. As Liz looks toward the future, Jack (Baldwin) and Jenna (Krakowski) evaluate their own self-worth, and Tracy (Morgan) laments a shocking medical diagnosis. 30 ROCK airs on NBC on Thursday, November 29 at 8:00 pm!