Enigmatic asylum owner Dr Tremayne houses four very special cases. Visited by his colleague Nicholas, Tremayne explains his amazing and controversial theories as to why each patient went mad, be they a ritualistic 'luau', a time-travelling bicycle, a toy tiger, and a tree stump.

Jack Hawkins
as Dr. Nicholas

Donald Pleasence
as Prof. R.C. Tremayne

Georgia Brown
as Fay Patterson (segment "Mr. Tiger")

Donald Houston
as Sam Patterson (segment "Mr. Tiger")

Russell Lewis
as Paul (segment "Mr. Tiger")

David Wood
as Tutor (segment "Mr. Tiger")

Suzy Kendall
as Ann / Beatrice (segment "Penny Farthing")

Peter McEnery
as Timothy Patrick (segment "Penny Farthing")

Neil Kennedy
as 1st Removal Men (segment "Penny Farthing")

Richard Connaught
as 2nd Removal Man (segment "Penny Farthing")