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.
Peter Sellers
Maurice Denham
Lionel Jeffries
David Lodge
Bernard Cribbins
Wilfrid Hyde-White
Irene Handl
George Woodbridge
Liz Fraser
John Harvey
Beryl Reid
Noel Hood
Myrette Morven
Edwin Brown
Cyril Chamberlain
Wallas Eaton
Andrew Downie
Thorley Walters
Mario Fabrizi
Warren Mitchell
Arthur Mullard
Vivienne Martin