Templar and the niece (Annette Andre) of a research scientist search through a labyrinth of tunnels underneath a mountain in Wales.
Murder is unpleasant at the best of times but when the gaiety of a west Indian holiday turns into a macabre murder enquiry, Simon finds himself dancing to the rhythm of a calypso death march.
At the tea party for wounded officers, Hazel feels drawn to Jack Dyson, a shy young pilot. Rose and Daisy await news about their soldier sweethearts, while James and Georgina meet in France.
Whilst on a top secret security assignment, Tara comes under suspicion of being a double-agent. She must cast similar suspicion on Steed if she is to prove that she has been framed.
