Please Sir! is a British television sitcom created by John Esmonde and Bob Larbey and featuring actors John Alderton, Deryck Guyler, Penny Spencer, Joan Sanderson, Noel Howlett, Erik Chitty and Richard Davies. Produced by London Weekend Television for ITV, the series ran for 55 episodes between 1968 and 1972. The theme tune "School's Out" was by Sam Fonteyn. The title derives from the then-standard request phrase used in Britain when they wish to interrupt the teacher with a question. Although the series is based around a class of 16-year-old pupils, all of the actors in these roles were in fact in their early 20s and looked distinctly too old for the setting. Synopsis The programme was set in the fictional Fenn Street Secondary Modern School and starred John Alderton as Bernard Hedges, a young teacher fresh out of training college. The supporting cast included Deryck Guyler, Joan Sanderson and Richard Davies. Character actors and actresses formed the guest cast, including Mollie Sugden as a parent of one of the pupils, Barbara Mitchell as Frankie Abbott's mother, and Ann Lancaster as Mrs Pearce in a pair of 1968 episodes. There were three basic locations for the scenarios: Hedges' classroom, the staffroom and the playground/outer area. The class nickname for Hedges is "Privet" deriving from privet hedges. Bernard Hedges and the 5C pupils were replaced by a new teacher and pupils for the final series in 1971–72, while the original pupils continued in a spin-off series, The Fenn Street Gang, which ran for 47 episodes between 1971 and 1973. This was followed by Bowler (1973), following crime boss Stanley Bowler, played by George Baker for 13 episodes. As with many situation comedies of this era, a film version was developed, released in 1971. This was set in an outdoor pursuit centre, but starred most of the TV cast. Cast Staff John Alderton as Mr Bernard Hedges (1968-1971) (36 episodes) Deryck Guyler as Mr Norman Potter, the caretaker (55 episodes) Noel Howlett as Mr Cromwell, the headmaster (55 episodes) Joan Sanderson as Miss Doris Ewell, the senior mistress (55 episodes) Richard Davies as Mr Price, the chemistry teacher (55 episodes) Erik Chitty as Mr Smith (55 episodes) Bernard Holley as Mr Hurst (1971-1972) (8 episodes) Vivienne Martin as Miss Petting (1971-1972) (8 episodes) Richard Warwick as Mr David Ffitchett-Brown (1971) (7 episodes) Lindsay Campbell as Mr Sibley (1970-1972) (5 episodes) Glynn Edwards as