ABC Weekend Television, who commissioned the show, broadcast it in its own regions four days later on Saturday 27 October.

Seeing the name Geoffrey in the book, they visit his quarters and also find it empty and an electric shaver still running.

Mrs Peel discovers the body of the milkman on his float just as a deafening shrill noise and quake shakes through the base.

Steed returns to the base and finds the lounge bustling with activity; he is greeted by old comrades.

Looking at the equipment, Mrs Peel surmises that the people in the airbase had been hypnotized and programmed to potentially create sabotage.

As Steed plays with a dental drill, the people in the lounge hear the shrill deafening noise over the speakers as he and Mrs Peel realize what has happened.

Steed and Mrs Peel overcome these criminals but not before laughing gas is set off leaving them in hysterics.

[4] Ray Austin, an ITC regular director, had an uncredited cameo role in the episode as the dead milkman.