First broadcast 9th October 1971.
New supply teacher and former army Captain Mr Dix runs his class with military precision and rules his class with a regimental authority.
Deryck Guyler - Norman Potter
Noel Howlett - Mr. Cromwell
Joan Sanderson - Doris Ewell
Richard Davies - Mr. Price
Erik Chitty - Mr. Smith
Peter Cleall - Eric Duffy
Glynn Edwards - Mr. Dix
Jeanne Mockford - Mrs. Duffy
Richard Mottau - Kevin Duffy
Bruce Hodgkins - School pupil
