we've talked about RMT "cats" here before. (You'd think that since it was their logo, they'd have gone out of their way to impersonate a good one.)

The best cat I've heard on this program was in one of the very first episodes: "The return of the Moresbys". Reason being? They apparently used the sound effect of a real one. (Good thing they did, as I'm sure those of you who've heard the episode would agree. And it was only used once, but most effectively.)