The Goodies have to tackle a gigantic white kitten which is terrorising London. A special episode, based on the original 1971 Goodies' "Kitten Kong" episode. The special was called "Kitten Kong: Montreux '72 Edition", and was first broadcast in 1972. The original 25 minute episode is thought to no longer exist, making it the only Goodies episode which is officially lost; however, the expanded and more elaborate version for the 1972 Montreux festival is said to have only minor differences with its 1971 prototype. One difference is the ending; in the original the giant mice are represented by stock footage of real mice inserted into the footage using chroma-key (CSO). In the Montreux version, giant model mouse heads are seen crashing through polystyrene walls. (thetvdb.com)