Season 1
- 1The Battle Of The Beams5 Jan 1977
- 2To See For A Hundred Miles12 Jan 1977
- 3Terror Weapons19 Jan 1977
- 4If...26 Jan 1977
- 5The Deadly Waves2 Feb 1977
- 6Still Secret9 Feb 1977
- 7Battle of the Atlantic24 Jan 1978
The series traces the moves and countermoves between British and German scientists on land, sea, and in the air.