Blue Watch are happy with their new uniform clothes and Maggie reads a letter from ex-fireman Colin to everyone. Forced to quit the brigade after an accident, he's found an office job now. A lorry driver crashes into a wall, which collapses and buries a kid with his bike beneath. Blue Watch is called to free the driver and the kid. Bayleaf loses his temper when another fireman takes the piss out of him because of his accidents.

ACO Bulstrode visits Nick about the prison incident and the stolen uniform, wondering why it's always Bayleaf who gets into such trouble. Bayleaf himself is pissed off that even his kids make fun of his accident. George and Kelly complain about the state of their flat to the landlord, but he says it's their own fault. Blue Watch represents the fire brigade in a charity action for the Children's Hospital Fund at a supermarket, where they have to build little houses in time. Billy had told Pearce that it would be fancy dressing, so he's the laughing stock when he appears in a chicken's costume. Patti's misplaced nun costume doesn't stop her from talking to Nick about Hallam's job offer and hopes for Geoff's promotion, taking Nick by surprise. Sicknote takes Jean on a romantic weekend in the country, but spoils her hopes for romance, when he meets an old guy called Douglas who gets him drunk first and takes him golfing the next day.

Hallam asks Nick who told him about the job in the first place and he admits that it was Patti. Blue Watch's old enemy Scase appears, newly promoted to District Officer. He requests a drill and catches Billy with missing personal items and Sicknote forgetting to book Sally out. Nick knows that he's only looking for trouble, but reprimands Billy and Sicknote nonetheless, reminding them how important it is to follow procedures. Sally goes to Rotherhithe as stand-by driver. She gets along fine with the firemen, but the female Sub Officer has no sense of humour and tells her that she only joined the fire brigade to get the men's attention, which won't work with her. Blue Watch must help to free people from squashed car wrecks in a huge accident. They realize that a very pregnant woman is involved and can't be freed in time. Pearce has to assist her and help delivering the baby in the car

A mentally disturbed kid named Donald hangs out at the station, much to Pearce's dismay. Bayleaf explains that he means no harm and only admires the fire brigade, Billy sends him to buy some papers. Scase appears again during an exercise to check Blue Watch's books. Kevin flirts with Sally and Bayleaf tells George that he considers leaving after all his accidents. The exercise is interrupted by the alarm bell - an elderly woman has called the brigade because she fears that her neighbour got trapped in a tank. An army tank, that is.

Billy tries to poison Pearce by pouring a lot of salt into his milk, but he doesn't even notice, much to Billy's and Kevin's surprise. They are called out for a little fire in a letterbox and Pearce yells at the kids for destroying the letters for nothing. Recall asks the whole watch to distribute search notices about Ben. Even Donald wants to help finding him. Patti barges in on Hallam with the excuse to lend some eggs though she only tries to seduce him again (without success). Claire learns that she has inherited a lot of money. Patti upsets Laura even further by suggesting that Ben could be injured in hospital somewhere. Sicknote goes golfing with his new friend Douglas and his mates, but he vanishes half-way through the game, feeling stupid. Ariadne marries Petros despite her feelings for Nick. While asking around for Ben, Donald gets beaten up by some young thugs. Recall and Laura go searching for Ben in the West End. Meanwhile, Blue Watch has to tackle a huge blaze at a futuristic games' club. Ben, who is roaming Soho, is terrified by a gay dirtbag who seems to be following him and seeks refuge at Soho Fire Station where he is finally reunited with his parents.

Sandra catches Hallam on the phone to Patti and grows suspicious. Billy allows Donald to sit at the wheel of the pump ladder and switch the blue lights on, but then the alarm goes off and Pearce catches them out, yelling at Donald to get lost. Desolate and hurt, Donald seeks refuge in an old factory, where he has built a model fire station. Meanwhile, Blue Watch arrives at a City Farm, where a smith has set the straw on fire. They tackle the blaze and evacuate the animals. Sicknote rescues a scruffy, extremely ugly mongrel and decides to adopt it. Billy jokes about Kevin and Sally, so that Kevin pushes him. Hallam interrupts them and sends Billy to evacuate the pigs, but he falls into the mud while chasing after them and the others hose him down.

Bayleaf and Claire go to take a look at the restaurant they'd like to buy with her money. Nick and his crew go on a fire precaution inspection to a restaurant, which has been turned into a nightclub. Billy manages to chat up one of the strippers, Lauren. Sally rejects Kevin's new advances and he vents his anger by attacking Billy over a stupid remark. Jean declares war on the mongrel and tells Sicknote to take him to the station with him for the next night shift, so that she can sleep again. Hallam tries to make up to Pearce about the Patti-incident. Kevin moves into a house boat and Billy comes to visit him with Lauren.

Hallam is sent to train on the fire brigade river boat on the Thames and Pearce takes over as Sub. Jaffa attacks Sicknote about fleas in the station and Nick has a go at him about the dog. The whole watch has to clean the station from attic to cellar as Nick fears another surprise visit from Scase. Down in the cellar, Billy finds some old uniforms. Blue Watch is called to a block of flats, where a young woman has cracked up and locked her husband and child on the balcony. She attacks Recall and Sally with a knife when they enter the flat, but they can overpower her.

Bayleaf and Claire start working on the restaurant. Nick seeks help with Dimitri, but he also tells him to leave Ariadne alone. After the shift, Billy takes the old uniforms , but he is caught by Pearce who is immediately suspicious. Kevin invites everybody to a party on his new boat, but Sally refuses - officially because she's got swimming training, but in truth because she's still angry with him. George goes to work in the theatre, where he saves the Russian primaballerina Larissa from a little blaze. The rest goes to Kevin's party, but he's not chuffed when - uninvited - the Pearce's turn up as well. When the party is over, Kevin cleans the boat and is attacked by two thugs who beat him up. At the station Kevin accuses Sally, but she says she has nothing to do with it.

Road workers discover a bomb near the fire station, while Nick's crew is just dealing with a little fire in a garbage can. Sally, who's on standby in the pump receives a call about the bomb. Blue Watch has to evacuate the street around the fire station and are refused entry, while army experts come to defuse the bomb and take residence in the station. Meanwhile, a careless car driver knocks over a little school girl and furious mothers stage a protest on the street against maniac drivers. Blue Watch has to watch how the bomb experts are working and don't know what to do. One crew goes to have lunch at another fire station where the food is miserable and the firemen obnoxious. The other crew is just about to have lunch at a fast food joint, causing raised eyebrows in their uniforms, when they are called to a block of flats where a guy is trapped in a lift. When they want to go up in the other lift, it gets stuck as well. The others have to come and get them all out of the lifts.

Sicknote starts worrying about his balding skull, but Jean only laughes at him. Charisma returns to Blackwall after some years and is joyfully greeted by his old friends. Nick, though, is rather stunned about his glib talking. George asks Jaffa to take over one-two hours for him so that he can start working at the theatre in time. The fake firemen are caught out by an old lady whose grandson is in the brigade and recognizes the old uniforms. Blue Watch is just doing a ladder drill, when the alarm bell goes off. Nick's crew leaves while the others continue the exercise on their own. They enter the kitchen in BA and frighten Maggie, who accidentally kicks a hose. The jet goes off and sprays the whole kitchen.

The gas explosions continue. Jaffa is badly burnt but still alive. Scase and Nick are at loggerheads again, when Scase cancels the helicopter Nick had requested for Jaffa's transport. But Nick later apologizes and says that Scase was right - no helicopter could have landed with all the debris flying around like missiles. Hallam and Sicknote try to evacuate a worker from the burning gas depot and get almost blown away by a new explosion. George hears about the huge blaze in the theatre and phones the station, just as Blue Watch returns. He is shocked to hear about Jaffa's accident and goes to see him in the hospital. Jaffa's wife tries to convince him that it was his own decision, but George feels shitty, knowing that he should have been in Jaffa's place . Kevin wants to visit George at home, but only finds Kelly who says that she simply can't get through to him at the moment. Meanwhile, George tells Larissa about the whole thing and she comforts him.

George is still racked with guilt about Jaffa's accident, but S.O. Suffolk tries to cheer him up as well. Sicknote wears a cap all of a sudden, but he only reveals to Charisma that his lotion has caused an ugly rash on his head. Nick and Pearce attend a coroner's inquiry about Donald's death at the blaze. Pearce has to admit that he was too rude to the boy and even feels guilty, but the coroner states that the incident will be treated as a sad accident. Pearce is truly humbled when Donald's mother tells him how fond he was of the brigade and gives him a drawing he had made of Blackwall. Meanwhile, Blue Watch is called to a flat, where a guy is stuck in the heating with his arm. His flat is full of yukky animals, causing Bayleaf to flee. He is called back to assist after Billy obviously "collapsed", but when he opens the medicine bag, a huge spider crawls out, shocking him, while everyone laughs.

Jean is just taking a parcel from the postman, when Sicknote returns from night shift and snatches it away from her. It turns out to be a hair piece. Sally visits her father in Wembley. Larissa says goodbye to George and gives him a signed programme of the ballet company. She invites him to visit her at the hotel later, but he resists temptation and returns home to Kelly. Nick gets a phone call from Ariadne who's been taken to Cyprus by Petros. He agrees to fly to Cyprus and fetch her home. Bayleaf and Claire want to confront her brother, but he's vanished.

Nick returns to the station and reprimands Billy and Pearce about the fighting. A man sets the flat and himself on fire in a room full of paint cans. George overreacts when trying to save him as if trying to compensate for Jaffa's accident. Pearce had seen that Sandra is on job-search again and not surprisingly, Sandra meets Patti at the job centre. Uncle Yanni and his friends appear at the station to confront Nick about Ariadne in front of the whole watch. Nick then visits ACO Bulstrode. Scase appears at the office, trying to pick on Nick, but Bulstrode takes his side and has a go at Scase. Sally tells Nick that she considers a transfer to the Northwest to be closer to her ill father.