The watch make a grim discovery, Maggie walks out when her kitchen is described as a 'health hazard', Billy finds Jo living with a drug dealer and there's a major fire at the hospital when a JCB crashes into an electrical sub station.
Billy has been arrested for the murder of drug dealer Clive, two boys have crawled into a mountain of rubbish with Pearce and Gregg sent inside on a race against time to rescue them and Carole gets a nasty surprise about Davies.
A bungee jump goes wrong leaving the jumper hanging, Billy is charged and awaiting trial for murder, Sicknote joins a road protest, Carole gets her revenge on Davies and a fire in a classroom sees a teacher fatally injured.
Following Jo's re-appearance and confession the murder charges against Billy are dropped, a resident complains about the siren noise from the station much to Nick's bemusement and a forklift accident ends with a man trapped beneath a crate.
Jack is less than thrilled when Nicky moves in, vigilantes set fire to a suspected pedophile's car, Jack and Recall fight in the yard and Pearce and Cling Film are taken hostage at Recall's house by Cling Film's deranged ex-wife.
George fills in at Cyril's sex shop and is amused when Pit Bull comes in as a customer, Sicknote inadvertently takes drugs whilst with the protesters and a shocking discovery at a hoax call leads Billy to make a big decision.
The pump is on stand-by at Upham bringing back bad memories for Carole who is dreading her looming transfer there, the watch trial a new quieter siren on the appliance and on return from a shout the pump crew find Upham station on fire.
Squirrel needs to be rescued after loosing her footing whilst hanging a protest banner on the Cutty Sark, George and Kelly hold a barbecue to celebrate reconciliation and three children are trapped when a fire starts at a bus depot.
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.