Miss Postern puts herself down for an Ironman competition, but realizes all too late what is involved. Mr Gunn offers to help her train, and Mr Church tags along, taking an unusual interest in PE suddenly. Mrs Klebb tries to stop violence at school. But the teachers aren't listening. Meanwhile, Mr Barber has taught the wrong Geography course.
Elenco: Catherine Tate , David Walliams , Frances de la Tour , Philip Glenister , Steve Speirs .