"Whose Line Is It Anyway?" is an improvisational comedy television series originally created by Dan Patterson and Mark Leveson. It began as a British radio show in 1988 before becoming a British TV series on Channel 4, hosted by Clive Anderson. The American adaptation first aired from 1998 to 2007, hosted by Drew Carey, and was later revived in 2013 with Aisha Tyler as the host. The show features a rotating cast of performers, including regulars like Colin Mochrie, Ryan Stiles, and Wayne Brady, who participate in various improv comedy games