 Butterworth was due to play Freddy but was unable because of other work engagements.Sid Carter (Sid James) is the cunning head of a criminal gang that includes the longhaired drip Ernie Bragg (Bernard Bresslaw), the cheeky Freddy (Bill Maynard) and Sid's honest son, Cyril (Kenneth Cope).Cyril does not want a life of crime, but is emotionally blackmailed by his father into going along with his scheme to rob Finisham Maternity Hospital for its stock of contraceptive pills and sell them abroad.