• Professor James Edwards played by
Jimmy Edwards • Mr Oliver Pettigrew played by
Arthur Howard in 1956–60 and
Julian Orchard in 1971 • Mr F.D. Price Whittaker played by
Kenneth Cope • Mr S.A. Smallpiece played by
Norman Bird • Lumley (a pupil) played by John Stirling • Mr R.P. Tench played by
Peter Glaze • Mr Halliforth played by
Edwin Apps in 1956–60 and Peter Greene in 1971 • Parker played by
David Langford • Mr Forbes played by
Keith Smith • Mr Proctor played by
Brian Rawlinson • Mr Dinwiddie played by Gordon Phillot in 1956–60 and
Harold Bennett in 1971 • Mr Cope-Willoughby played by Frank Raymond • Matron played by Barbra Archer,
Liz Fraser and by
Charlotte Mitchell • Taplow played by Gary Warren in 1971 • Potter played by
Greg Smith in 1971 • Proctor played by
John Clegg •
Clodagh Rodgers appeared as herself during the colour series in 1972 •
Max Bygraves appeared as himself in one episode in 1960 •
Vera Lynn appeared in one episode in 1959 == Surviving episodes ==