[2] The film was written by Norman Hudis based on the play Ring for Catty by Patrick Cargill and Jack Beale.

[4] Perhaps surprisingly, it was also highly successful in the United States, where it was reported that it played at some cinemas for three years.

That evening, the boxer Bernie Bishop is admitted after hurting his hand at the end of a bout.

Matron checks on the progress of the patients, and speaks to Mr. Hinton, who is forever listening to the radio with his headphones.

Nurse Dawson is sent to ring the bell to signal the end of visiting hours, but calls for the fire brigade by mistake.

Nurse Dawson comes in early to sterilise rubber catheters, but is interrupted by the demanding Colonel.

Oliver is furious when the ward has to be cleared and tidied up for Matron's rounds as it upsets his schedule.

Matron stops to speak to Oliver, who complains about the disruptive effects that her visits have on the patients.

Jack starts to panic as Oliver prepares to operate, but soon they are all giggling due to the laughing gas having been left on.

The colonel plays a trick on Nurse Dawson and pins a piece of paper with a red 'L' on her back.

The success of Carry On Sergeant led to Nat Cohen and Stuart Levy of Anglo-Amalgamated requesting a follow up.

"[13] A negative review in The Monthly Film Bulletin of the UK stated: "A somewhat stale farce, mixing slapstick, caricature and crudely anatomical humour, puts life in a public hospital ward into the same cheerlessly rollicking category as the barrack-room.

The script by Norman Hudis is pure Roquefort, the direction of Gerald Thomas is vaudeville-timed.