The strange deaths of several astronomers, left bleached white, pose a problem. Whilst Steed joins the stargazers, Emma chases a bright light, and finds herself in the hot seat.

An unfortunate motorist keeps knocking down and killing the same man: a man who's rampaging through the countryside, bulletproof and intent on destruction. A man who just happens to be identical to the urbane Professor Frank N. Stone.

The brother of the late Clement Armstrong sets a deadly trap for Steed and Mrs. Peel, whom he blames for his brother's death at the hands of his murderous creations, the Cybernauts.

The accidental death of a ventriloquist reveals that he had been carrying a fortune in gems inside his stomach. Steed stoops to blackmail and Emma goes shopping for ties in the search through the business community for a rich Borzoi.

When a scientist is found embedded in a wall, Steed and Emma pursue a man in make-up and wellies, whose appearance is terribly shocking.

When Sir Gerald Bancroft and his Rolls-Royce vanish whilst being escorted at a military base, Steed is called upon to solve the puzzle. But before he can he experiences that old shrinking feeling.