Newcomer and resident troublemaker Kyle Stack (George Sampson) manages to get on everyone’s nerves from day one
Bex Fisher (Tina O’Brien) is back but is desperately trying to hide her recent mysterious absence
Karen Fisher (Amanda Burton) is causing controversy on the first day when she introduces a scheme to separate the boys and girls
Grantly Budgen (Philip Martin Brown) is back as the head of English, but will he be his usual irritable and sarcastic self?
Vicki MacDonald (Rebecca Ryan) is back working hard and being a loyal friend to Bex and Jess, but this terms sees her coming out of her shell
Marcus Kirby (Wil Johnson) finds himself continuing to work for the state system despite hating it
Newcomer Kyle Stack (George Sampson) and Finn Sharkey (Jack McMullen) immediately clash when they first meet. Are they ever likely to become friends?
Karen’s Deputy Head Christopher Meade (William Ash) is back as one of the most hardworking members of staff, but he finds himself stretched to the limit to make the new segregation policy work
Tom Clarkson (Jason Done) returns as one of Waterloo Road’s most popular teachers, but this series sees him face one of his toughest challenges yet
Ronan Burley (Ben Ryan Davies) is continuing his money-making ways, hoping to emulate his hero Alan Sugar
Karen’s son Harry (Ceallach Spellman) has overcome his bulimia, but has his parents divorce affected him more than he’s willing to let on?
Adanna Lawall (Sharlene Whyte) is Head of Pastoral Care, a popular addition to Waterloo Road
After her pregnancy struggle last series, Janeece Bryant (Chelsee Healey) is back and hoping for a better year
Kyle Stack (George Sampson) and Jackie Stack (Lizzie Roper) immediately cause a stir on the first day when they arrive at school with a Rottweiler
Bex and her mum Karen are in for a tough time as Karen struggles to find out the truth about her daughter’s mysterious disappearance
A new terms sees new struggles for the students at Waterloo Road with the arrival of fresh students and a controversial scheme to split the boys and girls up in class. Will it work, or will they rebel?
The Fishers have been through the mill, but will things get better or worse now they are all at school together every day?
Will Sambuca, Finn and Denzil accept Kyle into their group?
Waterloo Road starts on Wednesday, February 2 at 8pm on BBC1