 What s the secret of the sticking plaster on Mr. Bronson s neck? Could it be a love bite? Jackie s reproaches Zammo for selling a present she gave him. Mr. King warns the class to stay clear of fibreglass, and Ronnie Birtles points the finger firmly at a disgruntled Imelda. In art, Ziggy has no hesitation in telling on Imelda, and she becomes determined to repay him. She ambushes him and stuffs fibreglass down his back. Meanwhile, Mr. Griffiths finds the off-limits area in the Upper School is on fire, and sounds the alarm. There is general reluctance for classes to leave after the previous false alarm. Mr. King finds Ziggy with an injured back, but he is reluctant to reveal Imelda s culpability. The fire is put out, but there s further bad news from the fire chief - the place is full of asbestos dust, and the whole building needs to be closed.