Whose line is it anyway?

I always found Whose line is it anyway? very patchy - probably inevitable in a wholly-improvised show.

Judge for yourself as regular contestants Colin Mochrie and Ryan Styles improvise a squash game ...

Produced by Channel 4 in the UK, the show went on to be pretty successful in the US.

The featured clip is from a US edition, with Clive Anderson hosting, but it is worth noting that Mochrie and Styles were frequent performers on the British show.