Contestants from across the United Kingdom and Ireland competed in a series of rounds that tested their physical stamina and mental attributes. The title of the show is a reference to Superman's home planet Krypton, the title perceiving that the contestants had strong superhuman "powers" for taking part in the challenges they were set. The contestants, from 1986 onwards, all had their own corresponding colour, either red, green, yellow or blue. The points contestants earned through the game were not referred to as their score, but as their "Krypton Factor", e.g. "The winner, with a Krypton Factor of 46, is the technical specialist from Birmingham, Caroline White". The 1987 series won the prestigious Premios Ondas – Spanish Television Award for Entertainment.
