Three criminals plan to break out of prison the day before their release in order to carry out a daring jewel robbery, intending to establish the perfect alibi by returning to jail afterwards. First however they must get out, a task made more difficult by a new, stricter prison officer.
Cast: Peter Sellers, Maurice Denham, Lionel Jeffries, David Lodge, Bernard Cribbins, Wilfrid Hyde-White, Irene Handl, George Woodbridge, Liz Fraser, John Harvey
