Murphy must go undercover in a biotech laboratory and comes up against a powerful adversary whom he cannot see.
| Name | Type | Role | |
|---|---|---|---|
| Colin Bateman | Writer | ||
| Alexis Conran | Guest Star | ||
| Ian Dunn | Guest Star | ||
| Michael Cochrane | Guest Star | ||
| Claire Skinner | Guest Star | ||
| Clare Isaac | Guest Star | ||
| Emma Kay | Guest Star | ||
| Nick S. Cox | Guest Star | ||
| Matthew Cullum | Guest Star | ||
| Rachel Isaac | Guest Star | ||
| Daniel Ball | Guest Star | ||
| Hayley Horgan | Guest Star | ||
| Eilidh Fraser | Guest Star | ||
| Michael J. Jackson | Guest Star | ||
| Lauren Beales | Guest Star | ||
| Dominic Jephcott | Guest Star | ||
| Michael Horgan | Guest Star | ||
| Bruce Jamieson | Guest Star | ||
| Andrew Bridgmont | Guest Star | ||
| Ed Fraiman | Director |