While Nick Cameron is returning to England from the continent with mysterious cargo in the cabin section of his small aircraft, he is thrown off-course by a severe electrical storm and loses radio contact. To his surprise and horror, he is arrested upon landing and accused of being a traitor in connection with the cargo he has been carrying - which, unknown to him, contained plutonium. Although he pleads innocent, Nick is not believed and is sentenced to a long term in prison. While in prison, he is subjected to special experimentation at a mysterious laboratory - with one unnerving, and unexpected, side-effect of the experiments being intermittent invisibility. —David McAnally
| Editing | Paul Hodgson | Editor |
| Crew | Paul Bond | Cinematography |
| Sound | Alexandre Faria | Music |
| Writing | John Sullivan | Writer |
| Crew | Daf Hobson | Cinematography |
| Production | Ron Purdie | Line Producer |
| Directing | Maurice Phillips | Director |
| Production | Linda Agran | Producer |
