De tijd van de Franse Revolutie, en burger Robespierre die de Franse aristocratie onthoofde. Wanneer het bericht Engeland bereikt, nemen twee heren, Sir Rodney Ffing en Lord Darcy, de taak op zich om hun Franse tegenhangers te helpen. Sir Rodney is een meester in vermommingen en wordt 'de zwarte spijker', gesel van camembert en bidet, de leiders van de Franse geheime politie...
Nee, helaas is Carry On ... Don't Lose Your Head nog niet beschikbaar op Netflix in Nederland.
| Writing | Talbot Rothwell | Screenplay |
| Sound | Eric Rogers | Original Music Composer |
| Art | Lionel Couch | Art Direction |
| Production | Peter Rogers | Producer |
| Editing | Rod Nelson-Keys | Editor |
| Camera | Alan Hume | Director of Photography |
| Directing | Gerald Thomas | Director |
| Production | Weston Drury Jr. | Casting |
| Costume & Make-Up | Geoffrey Rodway | Makeup Artist |
| Production | Jack Swinburne | Production Manager |
| Crew | Terry Gilbert | Choreographer |
| Costume & Make-Up | Emma Selby-Walker | Costume Design |
| Sound | Ken Barker | Sound Recordist |
| Camera | James Devis | Camera Operator |
| Directing | Jack Causey | Assistant Director |
| Costume & Make-Up | Stella Rivers | Hairstylist |
| Sound | Dudley Messenger | Sound Recordist |
