 As term starts, Jacko, Lee and Stewart practise their window cleaning skills. Mr. Robson, acting Deputy Head with Mr. Hargreaves away on a course, struggles with his new responsibilities, and a rather vociferous school secretary. Chrissy, now very visibly pregnant, gets ready for school with a newly invigorated Justine, fresh from her Sweden trip. On the way to school, Justine meets up with her new boyfriend, Liam, while Chrissy is bullied as she walks through an underpass. The bully s attention is distracted by the appearance of Liam, a St. Joseph boy. While Jacko s gang practise on the school windows, the caretaker advises Mr. Robson how hopeless the cleaners have been. When Mr. Griffiths shows the supposedly dirty windows, they have mysteriously become sparkling clean. As the fifth formers prepare for registration, Ray doesn t impress Maria and Matthew with his talk of becoming a millionaire. He acts out his fantasy, until an American voice tells him to get his feet of the table - he is spellbound by the entry of the new form teacher - Ms Janowitz. Mr. Robson encounters Natalie in the corridor and congratulates her on her singing at the end of term concert - but she claims to not understand what he s talking about. Ms Janovitz finds some discrepancies in the register - "Justine Bean" for instance, and two N. Stevens. Richard and Nick are horrified to find that Ray has fallen for his new American form teacher - and her impressive trainers. While Chrissy jokes with Justine about the hopelessness of Ted - they are aware of someone else in the cloakroom. They turn to find Nat listening - to their surprise, she is abusive, calling Chrissy a slag. Chrissy and Justine rally up some support from Maria and Fran to have it out with Nat. At the local shopping centre, Jacko and his mates struggle to find a car that is dirty enough to need cleaning. Lee comes up with the plan of making the windscreens dirty first - using a pail of mud and water. Ray, now obsessed by Ms Janowitz, goes to the shoe shop to try and find the same brand. With Chrissy s friends on the warpath, Matthew finds Natalie to warn her - but to his surprise, she pushes him off, telling him she s never seen him before in her life! Jacko s plan to muddy up a car, then clean it goes horribly wrong when their soapy water proves inadequate to the task of restoring the shine to a windscreen. Their would-be customer realizes their game when she finds one of their buckets near another muddy car, and she pours the contents onto the three lads  heads.