Whose Line is one of the greatest comedy shows I've ever seen and, for a change, the American version isn't shite! Ryan Stiles and Colin Mochrie are one of the nest double acts in the history of television. 
Has anyone seen Drew Carey's Green Show? It's basically Whose Line, but performed on front of a green screen (hence the title!) so they can throw animations into the games and 'bring them to life'. Most of the performers from the American version of the show are on it expect Wayne Brady and Ryan Stiles. It's nowhere near as good as Whose Line, but it is good in it's own right. The Improv All Stars was excellent though. It, again, was basically Whose Line on stage. It's available for download somewhere for sure, if you want to check it out. There's two of them. Another show you may be interested in is On The Spot, a sitcom that features improvised games from Whose Line throughout. Unfortunately this show got cancelled after five episodes, but it's worth downloading if you enjoy the American Version of Whose Line. It stars Jeff Davis who is a great improviser. Wow, this has got to be my longest post!
