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.

Directed by: Robert Day
Written by: John Warren & Len Heath
Runtime: 84 minutes
Cast:
Peter Sellers Peter Sellers
Dodger Lane 
Maurice Denham Maurice Denham
The Governor 
Lionel Jeffries Lionel Jeffries
Chief P.O. Sidney Crout 
David Lodge David Lodge
Jelly Knight 
Bernard Cribbins Bernard Cribbins
Lennie Price 
Wilfrid Hyde-White Wilfrid Hyde-White
Soapy Stevens