Sapphire & Steel - Season 1 - Eps 2: Assignment I: Escape through a Crack in Time (2)
Sapphire and Steel determine that Helen's bedroom is the location of a time break caused by the recitation of nursery rhymes. After narrowly avoiding a disaster, Steel boards up Helen's door to prevent the creatures inside from breaking loose. Rob begins to distrust the mysterious agents and sees a chance for escape when a policeman finally arrives in the morning. Sapphire is one step ahead of him, however, and traps the policeman in a time loop to prevent interference.
About Sapphire & Steel

Title: Sapphire & Steel
First Air Date: 1979-07-10
Last Air Date: 1982-08-31
Status: Ended
Rating: 7.4/10 (from 23 votes)
Language: EN
Seasons: 7
Total Episodes: 34
Network: ITV1
Genres: Drama, Sci-Fi & Fantasy
Production Companies: Unknown
Synopsis
Sapphire & Steel is a British television science-fiction fantasy series starring David McCallum as Steel and Joanna Lumley as Sapphire. Produced by ATV, it ran from 1979 to 1982 on the ITV network. The series was created by Peter J. Hammond who conceived the programme under the working title The Time Menders, after a stay in an allegedly haunted castle. Hammond also wrote all the stories except for the fifth, which was co-written by Don Houghton and Anthony Read. In 2004, Sapphire and Steel returned in a series of audio dramas starring David Warner and Susannah Harker.
Cast

David McCallum
Steel

Joanna Lumley
Sapphire