Rizzo the Rat "Midnight Cowboy". Steve Whitmire created the character, based on rats he had previously made out of bottles. Rizzo first appeared in episode 418 of "The Muppet Show", as one of many rats following Christopher Reeve backstage. He can be seen mugging and reacting to practically every line of dialogue. He remained a scene-stealing background figure through the final season, occasionally performing with Dr. Teeth and The Electric Mayhem. By the time of "The Muppets Christmas Carol", Whitmire had been performing Rizzo for around 12 years. After the series, he appeared in "The Great Muppet Caper" as a bellboy in a
TV Mayhem GMTV on 16 October. Neither "Hey Hey It's Saturday" nor "TV Mayhem" ever enjoyed the success of the "Wide Awake Club" or "WAC '90". After "TV Mayhem" got axed, TV-am replaced it with a new Saturday morning block programme for children called "Cartoon World", which as the name suggests, only showed cartoons. This ran from November 1991 to TV-am's demise in December 1992. TV Mayhem TV Mayhem was a British children's short-lived Saturday morning television series that was originally a replacement for "Hey Hey It's Saturday" after it was cancelled and aired from September 1991 for just six weeks on