The time of the French revolution, and Citizen Robespierre is beheading the French aristocracy. When word gets to England, two noblemen, Sir Rodney Ffing and Lord Darcy Pue take it upon themselves to aid their French counterparts. Sir Rodney is a master of disguise, and becomes "The Black Fingernail", scourge of Camembert and Bidet, leaders of the French secret police.
Unfortunately the movie Carry On Don't Lose Your Head is not yet available on HBO Max.
| Directing | Gerald Thomas | Director |
| Writing | Talbot Rothwell | Screenplay |
| Production | Peter Rogers | Producer |
| Sound | Eric Rogers | Original Music Composer |
| Camera | Alan Hume | Director of Photography |
| Editing | Rod Nelson-Keys | Editor |
| Production | Weston Drury Jr. | Casting |
| Art | Lionel Couch | Art Direction |
| Costume & Make-Up | Emma Selby-Walker | Costume Design |
| Costume & Make-Up | Stella Rivers | Hairstylist |
| Costume & Make-Up | Geoffrey Rodway | Makeup Artist |
| Production | Jack Swinburne | Production Manager |
| Directing | Jack Causey | Assistant Director |
| Sound | Ken Barker | Sound Recordist |
| Sound | Dudley Messenger | Sound Recordist |
| Camera | James Devis | Camera Operator |
| Crew | Terry Gilbert | Choreographer |
