 The last of four Carry-on medical movies centres on the plan by a group of criminals to steal some contraceptive pills from the hospital which involves one of them (Cyril) dressing as a nurse. In this film, it is Sir Bernard (Williams) who is after Matron and not the other way round. With a great but slight appearance by Charles Hawtrey as Dr. Goode, and funny cameo appearances by Joan Sims and Kenneth Connor, the sub-plots in the film come together at the end when the criminals decide tonight s the night!