First broadcast 24th July 1979.

The time break strengthens after a nursery rhyme hidden in a book becomes stuck in Helen's head.

David McCallum ... Steel
Joanna Lumley ... Sapphire
Steven O'Shea ... Robert Jardine
Tamasin Bridge ... Helen Jardine
Val Pringle ... Lead
Felicity Harrison ... Mother
John Golightly ... Father
Ronald Goodale ... Countryman