Christine settles in as head of Waterloo Road but quickly finds Simon is after her job.
As the school mourns the loss of Tom, deputy head Simon harbours a secret.
A day from hell for new science teacher Sue leads to a shady alliance with a pupil.
Princess's relationship with George continues to sour - leading her to temptation.
Rhiannon sends saucy pictures of herself to Darren and they end up all around the school.
Lisa and Lenny Brown's grandfather turns up out of the blue and risks splitting them up.
Grantly returns to teaching at Waterloo Road to discover the school is chaotic as ever.
Nikki has a tough decision to make when her estranged daughter shows up at Waterloo Road.
The staff and pupils of Waterloo Road get all dressed up for living history week.
The arrival of an enigmatic new supply teacher divides the already fractured staff room.
Christine and Simon clash over how to deal with a bullied pupil.
Chaos descends when a masked intruder disrupts the start-of-term assembly.
Carol gets a temporary job in the school kitchen, until George gets in the way.
Gabriella sees a chance to drive a wedge between Imogen and Dynasty's friendship.
George is caught off guard when his meddling mother shows up at the school.
Hector spies an opportunity to get closer to Nikki at the school's resilience camp.
Gabriella wreaks havoc when she suspects Nikki and Hector of having an affair.
George is left in charge of the school, but faces trouble when the pupils stage a protest.
When indecent images are found on Darren Hughes' phone, Christine goes to see his mother.
Christine falls off the wagon, sending shockwaves through the school.
Kacey's boxing career is jeopardised when a challenge by Gabriella goes horribly wrong.
