"Allen" is the second episode of the television series Prison Break, which was first broadcast on television on August 29, 2005. The episode is the second to air alongside the Pilot episode as part of the two-part start of the series. "Allen" was written by series creator Paul Scheuring and directed by Michael Watkins. Robert Knepper makes his first appearance as Theodore "T-Bag" Bagwell, but was not yet billed as a regular character until the following episode, "Cell Test".