Photo Flash: Sneak Peek - 'Mazel Tov' Episode on Tonight's 30 ROCK

Related: 30 ROCK, NBC

On tonight's episode of the NBC comedy 30 ROCK titled 'MAZEL TOV, DUMMIES!, ater 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. The episode airs 8:00 pm/ET on NBC. Get a first look below!

Entering its seventh and final season, the critically acclaimed and multiple award-winning comedy series "30 Rock" is told through the comedic voice of Emmy and two-time Golden Globe winner Tina Fey as variety show producer Liz Lemon. The series also features two-time Emmy and three-time Golden Globe winner Alec Baldwin as top network executive Jack Donaghy and Emmy nominee Tracy Morgan as Tracy Jordan, the unpredictable star of Lemon’s variety show, "TGS with Tracy Jordan." Lemon constantly has her hands full, juggling corporate interference from Donaghy and off-the-handle star antics from Jordan, all while attempting to salvage her own personal life.

Also rounding out the cast are three-time Emmy nominee Jane Krakowski as Jenna Maroney, the co-star of "TGS"; Scott Adsit as the variety show's producer Pete Hornberger; Emmy nominee Jack McBrayer as Kenneth, the over-eager and effortlessly endearing NBC page; Judah Friedlander as Frank, the sardonic slacker on the writing staff; and Keith Powell as Toofer, the sophisticated yet sarcastic, Harvard-alum writer.

Photo by: Ali Goldstein/NBC