The Lyell team return to the tunnel and uncover some difficult truths, while the police raid the protester camp, desperate for answers. Family ties are pushed to their limits.
| Name | Type | Role | |
|---|---|---|---|
| Michael Crompton | Writer | ||
| Joseph Beattie | Guest Star | Trevor Taylor | |
| Edward Bennett | Guest Star | Malcolm Coles | |
| Tom Christian | Guest Star | Philip Stratton | |
| Umi Myers | Guest Star | Emma Pryor | |
| Kirsty Hoiles | Guest Star | Hannah Coles | |
| Jemma Redgrave | Guest Star | D.I. Jill Raymond | |
| Nick Bartlett | Guest Star | John Pryor | |
| Dinita Gohil | Guest Star | Bela Nasir | |
| Rosina Carbone | Guest Star | D.S.I. Jennie Gibbs | |
| Janet Kumah | Guest Star | Donna Chainey | |
| Waj Ali | Guest Star | Anthony Barzani | |
| Aislín McGuckin | Guest Star | Aoife | |
| Nicholas Gleaves | Guest Star | Bob Stratton | |
| Anna Burnett | Guest Star | Frankie Stratton | |
| Christine Lalla | Director |