The Avengers "are needed" after reports that a motorist has repeatedly run over and supposedly killed the same person. Their investigations lead them to the country and the top secret Neoteric Research Unit, which is run by the appropriately-named Dr. Frank N. Stone, who has made a startlingly life-like robot of himself, so much so that Steed finds it hard to tell the two Stones apart.
don @ minifie-1
Did You Know?
The so-called Ministry of Defence Neoteric Research unit, or at least its main entrance thereof, was actually that of the Haberdashers' Aske's School Elstree....just down the road from the late-lamented Elstree Studios. The gates date from the time that it was the stately home of Aldenham House. The bridge at Tykes Water (a very pretty and totally rural location in the school grounds) was extensively used for incidental shots, and also for the opening sequence in the Tara King series. See more
There is an obvious stunt double for Steed in the fight scene in the cottage. See more
Where's the body?
There isn't one
There's always a body!