Series A, Episode 7. First broadcast on Monday 13 February 1978.

And now on Maximum Power, Avon and Cally are Poirot and Marple on a Mission to Destiny.

This week, Pete doesn’t care if your whole world turns into a mushroom, Peter’s people have a saying about trusting people or something. Don’t worry about Si, he lacks affection and Simon has written something in blood… It says 54124. Now what could that possibly mean?!