With exams over it's careers advice day for Form K, but it is Alfie who makes the biggest decision of all when he realises he can't go on teaching without his beloved class and quits Abbey Grove. Fraser is devastated to lose his best friend and takes the news badly. Alfie reveals he has landed himself a job at the Playstation factory and cannot be tempted back despite Gulliver and his class begging him to return. But will the truth about Alfie's new job be exposed and will they manage to convince him to return to Abbey Grove? And who will be crowned prom king and queen?

It's near the end of term at Abbey Grove, and Alfie is prepping for a careers presentation – really just an excuse to reunite all the old Class K and have a big party. Meanwhile Stephen has been teaching at Abbey Grove for six months, but none of his old schoolfriends know this. He has been maintaining the fiction that he is now a musical theatre star on the rise and tells his pupils (the new Class K) that they cannot blow his cover.