Good Cop Bad Cop was played once on the American edition of Whose Line.
This game was played with three people. The one time it was tried, Wayne Brady had an appliance that broke down, while Colin Mochrie and Ryan Stiles portrayed the repairmen. However, Colin and Ryan were supposed to do it as if they were cops utilizing the "Good cop, bad cop" method of interrogation, with Colin the bad cop and Ryan the good cop. This often entailed a lot of faked violence on Colin's part and was very straightforward, drawing on the nature of the "good cop, bad cop" interrogation method for humorous effect.