"The Bubble" is the fifteenth episode of the third season of the American television series 30 Rock. It was written by series' creator Tina Fey and directed by Tricia Brock. The episode originally aired on NBC in the United States on March 19, 2009. Jon Hamm and Bobb'e J. Thompson guest star in this episode, and there are cameo appearances by Calvin Klein and Meredith Vieira.

The third season of 30 Rock, an American television comedy series, consists of 22 episodes and began airing on October 30, 2008, on the NBC network in the United States. The season was produced by Broadway Video, Little Stranger, and NBC Universal; the executive producers were series creator Tina Fey, Lorne Michaels, Marci Klein, David Miner, and Robert Carlock.