George Little

Steed is ordered to infiltrate a gang of assassins. His appointment with their leader is in a small jazz club where Venus Smith is singing.

A young government official staying at a holiday camp is killed and replaced by an exact double, part of a plan to gain information. Two other doppelgangers are also part of the plot, being hatched in the camp, and Mrs. Gale is sent to deal with the false Steed. Hopefully, she will get the right one.