The crew steals a Federation deciphering unit and accidently leave Cally behind. Travis finds her and decides to used her in a hostage trap for Blake.
| Name | Type | Role | |
|---|---|---|---|
| Terry Nation | Writer | ||
| Peter Miles | Guest Star | ||
| Ian Cullen | Guest Star | ||
| Ian Oliver | Guest Star | ||
| Astley Jones | Guest Star | ||
| Peter Craze | Guest Star | ||
| John Bryans | Guest Star | ||
| Vere Lorrimer | Director |