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NBC's '30 Rock' finale Thursday May 14, VIDEO

By April MacIntyre May 13, 2009, 16:27 GMT

01/25/2009 - Tina Fey -The show stars and is produced by Tina Fey, with Alec Baldwin, Tracy Morgan, Jame Krawkowski and Judah Friedlander. © Albert L. Ortega / PR Photos

NBC's hit comedy "30 Rock" winds up this week.

NBC has sent Monsters and Critics a preview video featuring some hilarious moments from the season finale.

The show stars and is produced by Emmy winner Tina Fey, with Oscar nominated and Emmy winner Alec Baldwin, Tracy Morgan, Jame Krawkowski and Judah Friedlander.

The season finale airs tomorrow May 14 at 9:30pm on NBC.

Season 3 of NBC's "30 Rock" closes with Jack trying to connect with his biological father (Alan Alda), but his health begins to suffer.

Meanwhile, Liz gains fame as a relationship expert.

Sheryl Crow, Mary J. Blige, Elvis Costello, Clay Aiken and Adam Levine of Maroon 5 guest star.

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