Sam looks for connections between Ian Neal and a killing in Northern Ireland in 1985. Meanwhile DI Connor's wife arrives in Cambridge.
| Name | Type | Role | |
|---|---|---|---|
| John Milne | Writer | ||
| Alec Sabin | Guest Star | Newsreader | |
| Phil McKee | Guest Star | Ian Neal | |
| Martin O'Brien | Guest Star | Billy Govern | |
| Lisa Martin | Guest Star | Lizzie Nelson | |
| Lesley Vickerage | Guest Star | Helen Connor | |
| Stuart McQuarrie | Guest Star | Alastair Rogers | |
| Georgina Torpey | Guest Star | Marie Kavanagh (aged 13) | |
| Lesley McGuire | Guest Star | Marie Kavanagh (aged 25) | |
| Stephen Churchett | Guest Star | Charles | |
| Elizabeth Berrington | Guest Star | Jane Nelson | |
| Maureen Blackwood | Guest Star | Forensic Scientist | |
| Alain Bourgouin | Guest Star | Man | |
| Ben Daniels | Guest Star | Owen Johnson | |
| Linda McGuire | Guest Star | Claire Willis | |
| Kevin McGuire | Guest Star | Man | |
| Lloyd Martin | Guest Star | Daniel Nelson | |
| Ian Knox | Director |