Colin Mochrie and Ryan Stiles, who would later star in the U. version, became regular cast members in the seventh and eighth seasons.
The UK series was brought to the attention of Drew Carey, who worked with regular Whose Line?
From the second season onward, other musicians joined Hall – Linda Taylor made frequent appearances playing guitar and occasionally keyboards, while Cece Worrall-Rubin, Anne King, Candy Girard, and Anna Wanselius appeared alongside Hall (and sometimes also Taylor) on occasion.
The number and type of games played varied from episode to episode, yet while some games became more common over time, others faded from use.
Unlike the UK original, the US version occasionally featured a celebrity guest performer, such as Robin Williams, Kathy Griffin, and Whoopi Goldberg, while on other occasions, a celebrity made a guest appearance for individual games; such appearance have included Sid Caesar, Celebrity guests became a regular feature of the show beginning with season 9.
Improvisational musician Laura Hall, who appeared in the final season of the UK original, joined the original U. format for its entire run and performed piano and keyboards in games featuring improvisational singing by the cast members.
The style of the games were varied (see Games, below).
Some featured all four performers, while others featured fewer.
At the conclusion of each episode, a winner or several winners were chosen arbitrarily by Carey.In addition to being tested on their comedy skills in improv games, the performers are also tested on other skills, such as singing, dancing, or impressions, as Whose Line features a number of musical games, with one or more of the show's resident musicians playing live backing music for them, except on a few occasions when pre-recorded music was also used.Although they had no bad feelings about these sort of games, many of the performers disliked them; while Wayne Brady turned out to be well suited to them, having Chip Esten, Jeff Davis, Brad Sherwood and Gary Anthony Williams making frequent appearances as his duet partner, Stiles frequently expressed open disdain towards the "Hoedown" game, which became a bit of a running gag, while Mochrie rarely sings any lyrics, mainly preferring to deliver his lines in a spoken word fashion, much like in the UK original. was created by Dan Patterson and Mark Leveson in 1988 as a radio show on BBC Radio 4 in the United Kingdom. ) is an American improvisational comedy show, which was originally hosted by Drew Carey on ABC and ABC Family and ran from August 5, 1998 to December 15, 2007.The series is an official adaptation of the British show of the same name and features Ryan Stiles, Colin Mochrie, and Wayne Brady as its regular performers with the fourth seat occupied by a guest panelist.