Megan is back at work and Valerie is shadowing the night shift but for Cyril and David the fun of ashtray hockey is soon forgotten when they are called out to a collision of two school minibuses, each packed with pupils.
Megan wants to resign, Kuba faces the sack and Valerie tells Charlie to make savings in the department. Meanwhile, it's Bonfire Night and they face burns victims, suicide and a young girl with meningitis.
Among the patients are an arthritic suffering from hemotemosis - side-effects from a drug prescribed by his GP; an old lady with scalding and a homeless punk with a chest infection. The staff find time for a wheelchair race and Charlie manages to ask Valerie out.