“The Superlative Seven” is the twelfth episode of the fifth series of the 1960s cult British spy-fi television series The Avengers, starring Patrick Macnee and Diana Rigg and guest starring Charlotte Rampling, Brian Blessed, Donald Sutherland, and James Maxwell. It was first broadcast in the Southern and Tyne Tees regions of the ITV network on Wednesday, 5 April 1967. ABC Weekend Television commissioned the show for ITV and broadcast it in its own regions three days later on Saturday, 8 April. The episode was written by Brian Clemens and directed by Sidney Hayers.
https://en.wikipedia.org/wiki/The_Superlative_Seven
