Carry On Cleo appear in every "Carry On" up to "Carry On Emmannuelle" in 1978, making her the most prolific actress in the series. The title role is played by Amanda Barrie in her second and last Carry On. Along with "Carry On Sergeant" and "Carry On Screaming!", its original posters were reproduced by the Royal Mail on stamps to celebrate the 50th anniversary of the Carry on series in June 2008. The film opens during Caesar's invasions of Britain, with Mark Antony (Sid James) struggling to lead his armies through miserable weather. At a nearby village, cavemen Horsa (Jim Dale) and Hengist
Carry On Behind already made their final "Carry On" film appearances. Chilly spring filming meant the bare trees, muddy fields and icy breath are all quite visible, although the setting is a summer caravanning holiday. A similar dilemma met the cast and crew in "Carry On Camping". The signage in Fred Ramsden's butcher's shop clearly shows that the shop is closing for the Easter holidays, which can occur as early as March. Whilst this film was in production, Bernard Bresslaw and Joan Sims also appeared in "One of Our Dinosaurs Is Missing", another film being made at Pinewood Studios alongside "Carry On Behind".