After the British version of WHOSE LINE IS IT ANYWAY? brought improvisational comedy to the masses, the American version of the show borrowed the same formula and achieved the same results. The show hurls many difficult and amusing challenges--including songs, games, and other spontaneous activities--at its constantly rotating line-up of guest performers, all of whom have to be at the top of their game to keep up with the pace of the show. This first season of WHOSE LINE IS IT ANYWAY? includes regular contestants such as Ryan Stiles, Drew Carey, and Colin Mochrie.