New recruits Dan, Joe and Sally join the watch and both Dan and Joe are immediately attracted to Sally. These tensions only increase as the watch have to free a man trapped at a Sluice Gate and deal with a major fire at a shopping centre.
Jack and Recall are trapped at the shopping centre fire. Joe blames Dan for their injuries deepening their feud. On the next duty, Dan and George have to rescue a woman and baby trapped in an upstairs room at a burning restaurant.
Blue Watch are called when a burglar becomes trapped between two houses. Dan and Joe clash and a bystander intervenes. The bystander transpires to be new Station Officer Chris Hammond who's unimpressed by how Pearce has been running things.
Chris's estranged daughter Lisa wants to move in. The watch have to rescue a deaf man stuck in a precarious position and when an elderly woman is trapped in a fire at a scout hurt a conversation with her husband gives Jack food for thought.
Jack continues to press Linda to run away with him, Chris is furious when he finds out that Lisa has been caught shoplifting and when a police chase ends in a car crash the watch are shocked by a revelation about Sally's past.
Nick has began to have serious doubts over Chris Hammond's fitness to lead Blue Watch and these doubts only increase when he learns of Chris's gambling debts. Before he can act, the bells go down and the watch are called to a major blaze at a cinema where Costas and Marianne are thought to be inside.
The watch are reeling after Nick's death. Chris arranges a drink to raise their spirits but the evening ends on a sour note when Marianne makes it clear she holds him responsible. Meanwhile, Geoff is delighted by the return of a familiar face and Jack starts to crack over Linda and Steven moving away.
George finds himself in hot water when Chapman learns of his job at Terry Martin's club, Sicknote risks his life to rescue a young girl trapped in a school fire and afterwards gives the watch some devastating news.
It's D-Day as the inquiry about George's secondary employment starts and Dan has a drill as part of the Crew Commander course. Dan starts to have doubts about firefighting when he and Geoff are caught in a scaffolding collapse.
Jack is in an even worse mood than usual and finally cracks on the turntable ladder in the midst of a challenging shout. Meanwhile, D.O. Chapman has bad news for George and is surprised when George gets support from an unexpected source.
Chris misreads the situation between Lisa and Recall and calls in the police, after Sally has moved out with her a drunken Yvonne turns up at Joe's flat revealing Sally and Joe's closeness to a jealous Jacqui and a panicked horse complicates a shout at an RTA.
Sally is concerned by Yvonne's disappearance after a fire at her flat and is especially worried when the watch are called in to drag a body from the Thames. A fire on a ship where illegal immigrants have stowed away sees two of Blue Watch put in lethal danger.