query: How many episodes of 30 Rock were there?
passage: List of 30 Rock episodes
30 Rock was a critical success, winning several major awards (including Primetime Emmy Awards for Outstanding Comedy Series in 2007, 2008, and 2009), and achieving the top ranking on many critics' year-end best of 2006 and 2007 lists.[1] On July 14, 2009, the series was nominated for 22 Primetime Emmy Awards, the most in a single year for a comedy series.[2] Despite the acclaim, the series struggled in the ratings throughout its run.[3] During the course of the series, 138 episodes aired over seven seasons.
passage: 30 Rock
30 Rock is an American satirical television sitcom created by Tina Fey that ran on NBC from October 11, 2006, to January 31, 2013. The series, based on Fey's experiences as head writer for "Saturday Night Live", takes place behind the scenes of a fictional live sketch comedy show depicted as airing on NBC. The series's name refers to 30 Rockefeller Plaza in New York City, the address of the Comcast Building, where the NBC Studios are located and where "Saturday Night Live" is written, produced, and performed. This series is produced by Broadway Video and Little Stranger, Inc., in association with NBCUniversal.