An ex-squaddie suffering from PTSD loses his grip on reality and endangers the team.

When she's held at gunpoint, Donna's quick thinking saves the day but has personal ramifications. And as Felix and Carl investigate the disappearance of a teenager, Carl gets a disturbing insight into his boss' life.

Following revelations about his son, Ryan loses his temper, and Jake witnesses a darker side of his mentor. Carl's chaotic personal life threatens a high-stakes case, and a runaway iguana plays cupid for Lino.

Felix investigates a kidnap case with more to it than meets the eye. Jo struggles with Robert's rejection and Carl is left to pick up the pieces.

The team struggles to cope with a nightmarish Saturday night in Brighton, including a drugs death, a stake-out, and a dog high on cocaine.

With an escaped prisoner on the loose, Carl and Felix investigate a spate of muggings on public school boys. Meanwhile, Jo investigates a distressing case that brings Jake and Ryan to blows.

Jake is humiliated when he makes a spectacular rookie error on Brighton Pier. Meanwhile, an eccentric drug dealer is finally in Jo's sights, but his esoteric musings prompt her to consider her life choices.

Rookie cop Jake Vickers faces a tough first day on the job with everything from a suicidal mental patient to an outrageous shoplifter. But as the son of the Chief Superintendent his hardest task is to earn the respect of his colleagues.