A group of men in prison (Peter Sellers, David Lodge, Bernard Cribbins) come up with a plan to steal a large haul of diamonds with the help of friends on the outside (Wilfred Hyde-White, Liz Fraser). It involves breaking out of prison and then breaking back in again after the robbery to give themselves the perfect alibi. This is an entertaining British comedy crime film with a strong British cast.
3/5 
Peter Sellers
Bernard Cribbins
Wilfrid Hyde-White
Maurice Denham
Lionel Jeffries
Irene Handl
Liz Fraser
Beryl Reid