Supposedly filmed in 'Schizophrenoscope', it concerns Inspector Quilt of Scotland Yard's attempts to retrieve a 'Mukkinese Battlehorn' stolen from a London museum. Along the way he meets characters not dissimilar to Eccles, Henry Crun and Minnie Bannister from The Goon Show. This attempt to adapt Goon humour to the big screen was written by Harry Booth, Jon Penington and regular Goon show co-writer Larry Stephens. It was then heavily rewritten on the filmset by Sellers and Milligan.
Unfortunately the movie The Case of the Mukkinese Battle-Horn is not yet available on HBO Max.
| Writing | Larry Stephens | Screenplay |
| Crew | Gerald Gibbs | Cinematography |
| Crew | Spike Milligan | Additional Writing |
| Writing | Jon Penington | Screenplay |
| Crew | Peter Sellers | Additional Writing |
| Editing | Ferne Muleboot | Editor |
| Sound | Edwin Astley | Music |
| Directing | Joseph Sterling | Director |
| Writing | Harry Booth | Screenplay |