Cast and credits of Whack-O!

Jimmy Edwards
Professor Jimmy Edwards (60 episodes, 1956-1972)

Arthur Howard
Oliver Pettigrew (47 episodes, 1956-1960)

Harold Bennett
Mr. Dinwiddie (13 episodes, 1971-1972)

Julian Orchard
Oliver Pettigrew (13 episodes, 1971-1972)

Philip Howard
L.J. Sneath / ... (10 episodes, 1957-1960)

Liz Fraser
Matron (10 episodes, 1957)

Andrew Jack
Schoolboy (10 episodes, 1957)

Gary Warren
Taplow (10 episodes, 1971-1972)

Victor Baring
M. Aristide Beaumarie (7 episodes, 1956-1957)

Tony Sympson
R.D. Spelthorne (7 episodes, 1956-1957)

David Langford
Parker / ... (7 episodes, 1958-1960)

John Lewis
Mr. R. Palmer (7 episodes, 1958)

Barbara Archer
Matron (6 episodes, 1956)

Norman Bird
S.A. Smallpiece (6 episodes, 1956)

Frank Muir
(60 episodes, 1956-1972)