Cowley is offered the name of a highly-placed double agent from an old colleague - who in return wants to be guaranteed protection with CI5. This leads to the start of a dangerous stand-off between the two, using Bodie and Doyle as the pawns.
| Name | Type | Role | |
|---|---|---|---|
| John Goldsmith | Writer | ||
| Robert Booth | Guest Star | ||
| Peter Cartwright | Guest Star | ||
| Paul Dawkins | Guest Star | ||
| James Laurenson | Guest Star | ||
| Michael Gothard | Guest Star | ||
| Godfrey Jackman | Guest Star | ||
| Alec Linstead | Guest Star | ||
| Frank Jarvis | Guest Star | ||
| William Morgan Sheppard | Guest Star | ||
| Morris Perry | Guest Star | ||
| Jacob Witkin | Guest Star | ||
| William Brayne | Director |