Eric Jansen breaks out of the psychiatric unit of prison shortly before the anniversary of his arrest with vengeance on his mind. One problem, though: the man responsible for putting him behind bars, Marty Hopkirk, is already dead. Jansen decides that someone named ""Hopkirk"" is going to pay, so he sets his sights on killing Marty's widow, Jean.
| Name | Type | Role | |
|---|---|---|---|
| Donald James | Writer | ||
| Richard Owens | Guest Star | ||
| George Sewell | Guest Star | ||
| Ann Castle | Guest Star | ||
| Henry Davies | Guest Star | ||
| William Dysart | Guest Star | ||
| Ron Pember | Guest Star | ||
| Barrie Ingham | Guest Star | ||
| Colin Rix | Guest Star | ||
| Timothy West | Guest Star | ||
| Sue Vaughan | Guest Star | ||
| Cyril Frankel | Director |