Kenny Lynch, Nicky Henson, Jo Kendall and Christopher Wray
BBC1, 27 July to 21 September 1967 (9 episodes)
Each week two schools would compete against each other in a quiz, the winner going through to the next round.
The most unusual part of the show was the prize. Each team was asked to bring a metal object with them, and the culmination of all these objects was welded into a groovy, chrome pop art sculpture which was then presented to the series winners. Losers received a WH Smith book token for their troubles.
Based on an idea by Britt Allcroft, who had served on Blue Peter's production team and would later turn Thomas the Tank Engine into a global phenomenon.
The producer was Cynthia Felgate, who like Allcroft would go on to somewhat bigger things - in her case, serving as the executive producer and then editor of Play School over a decade and a half, and devising that show's successor, Playbus (later renamed Playdays).