Nothing to do with the TV show of the same name, "Mastermind" was actually an infuriating puzzle game where you had to �crack the code� by matching four different coloured plastic pins set in a plastic board.
First sold in 1972, its commercial success can probably be traced to the picture of the alluring young woman and wise old sage on the box. It had nothing to do with the game, of course, but seemed to promise: "Yes, winning this game will gain you the respect and love of this beautiful girl, and prove your wisdom to all - honest".