In the summer of 1967 the "Carry On" producer Peter Rogers assembled the cast for the 15th film of the series, "Carry On Doctor". Rogers initially chose Joan Sims to play the role of the hospital matron but she declined the part, stating that Jacques's performance of the role in "Carry On Nurse" could not be bettered. As such, Rogers cast Jacques as Matron, with Sims accepting a smaller role as the timid assistant of the film's lead character Francis Bigger, played by Frankie Howerd. Jacques's screen time was increased from "Carry On Nurse", as the producers considered her part to be an extension of the earlier role. "Carry On Doctor" was released in December of that year, to much success.