Each hour-long episode was divided into three 20-minute segments: a mystery, Stop Susan Williams; a science fiction/Western hybrid, The Secret Empire; and a horror story, The Curse of Dracula.

[1] To add to the "in-progress" feeling of the proceedings, all three series started with different chapter numbers (although this was the first broadcast for all of them).

The show was cancelled after only 10 episodes had aired, by which point only The Curse of Dracula had reached its conclusion.

However, one unaired episode (which did air overseas) featured the two concluding chapters of The Secret Empire as well as the final part of Stop Susan Williams.

American viewers later got a chance to see the concluding part of Stop Susan Williams when its eleven installments were re-edited into a single two-hour television movie The Girl Who Saved the World.