With Miss King out of action nursing a broken ankle, Steed goes it alone when Scotland Yard colleague Sir Arthur Doyle brings him in on a murder enquiry, with an abundance of clues, each one pointing to an illustrious suspect. In fact, bogus cops Earle and Gardiner are operating a racket whereby they deliberately incriminate worthies as murder suspects and then blackmail them. Their latest target is Steed and his supposed victim is Miss King.
—don @ minifie-1