Kev's return back to work after been involved in a fire on the Churchill estate doesn't go as smoothly as he would of wished. First he spends the day thinking he'd saved a woman behind the wheel of a crashed car, only to then find out she died later in hospital. New boy 'Asbo' stays quiet and mostly un-noticed by Kev, but he has a secret to hide. Nick tells Kev that he is to be honored at an awards ceremony and also sends a councillor to see him at work.

Kev and Mal are off duty when they witness a young girl jump under a underground train. Whilst Mal tries to poke fun at the incident, Kev takes it a lot more seriously prompting the two to fall out. Kev and Trish's relationship is left in tatters after they get engaged as Kev goes out on a drunken binge with Asbo. Leading Trish to find solace in Mal. Kev also has to deal with the repercussions of what happened at the awards ceremony whilst Little Al struggles to prove himself.

Little Al has made a deal to lose his latest cage fight, however when he doesn't, he has to deal with the repercussions. Rob invites the whole crew without Little Al's knowledge. The next day a risky rescue attempt trying to save a man planning a skyscraper banner proposal to his girlfriend almost goes wrong but Little Al finally manages to prove himself to Kev. During all the commotion, Asbo runs off, leading Kev to finally work out that he knows Gog, so he pays him a home visit, leading to his mum realising how involved her son was in the incident at the Churchill Estate.

A house fire has broken out and the team attend - a woman is horrified that her 'baby' is still in the house. Kev soon finds the 'baby', a 27 year old bed-ridden obese woman who has to be airlifted out of her bedroom. Ziggy went to school with the girl, who reveals that Ziggy had dropped out to give birth to twins. The rest of the crew were unaware of this and so give Ziggy a hard time about it back at base. Mal admits his true feelings to Trish. Kev can't seem to get hold of Asbo but is paid a visit by his mum who's clearly been beaten up. Asbo is convinced to go out for Gog's birthday as his mum has yet to reveal the damage he has caused. Kev spends the night at a hippy commune with Ziggy before meeting her kids. He then delivers an ultimatum to Trish and Mal. But Trish has something to reveal herself.

Asbo messes up during a training exercise so Mal goes to see Kev with his concerns about continuing to work with him. Tension between the pair is still rife. Ziggy contacts Trish to tell her she's concerned about Kev with the upcoming anniversary of the Churchill Estate fire. A rescue at an old building see's Mal pair up with Asbo, however when things go wrong and Asbo ends up saving Mal's life the animosity between the pair results in Kev finally showing Mal up for what he has done in front of the rest of the team. Trish's past catches up with her when she goes in for her first day at her new job. Whilst Gog catches up with Asbo. Trish finally gets through to Kev as she visits her daughter for the first time. Kev finds Asbo on his doorstep, petrified about Gog coming after him.

One year on from the Churchill Estate Fire see's Kev been paid a visit by Rosa,she tells him that Dennis helped her out on the night of the fire. Little Al is thrown in at the deep end when Tina turns up with Liam unexpectedly at work. Mal finds out his transfer has gone through. Asbo knows Kev knows the truth now and confides in Trish. Trish and Kev start to resolve their relationship issues but Trish has to rush off to spend a day with Grace and her mum. Asbo's Dad has turned up at the station so when Kev goes to confront him about the estate fire he has them both to contend with. Little Al worries about Rob's health as Liam causes trouble around the station. Later Rob gets rid of some unwanted visitors causing Little Al trouble.

White Watch attempt to save Trish from a really dangerous situation in the Blackwall tunnel.

After the Blackwall Tunnel explosion, Kev decides to take some drastic measures to try and move on.