Comedy legend Frankie Howerd stars as the victim of sinister shenanigans in this hilarious spoof of British horror films of the early ‘70s. Starring Hugh Burden and Oscar winner Ray Milland, and written by Terry Nation. Foster Twelvetrees, a struggling tragedian who scrapes a living by giving hammy performances from the classics, can hardly believe his luck when he’s invited to give a dramatic reading at the country home of a well-off family. Joy soon turns to outraged horror when he discovers dead bodies, foul intentions, lots of snakes and a madwoman in the attic. Can he uncover the hidden family secret before he comes to a sticky end..?
Unfortunately the movie The House in Nightmare Park is not yet available on HBO Max.
| Writing | Clive Exton | Writer |
| Directing | Peter Sykes | Director |
| Sound | Harry Robertson | Music |
| Production | Clive Exton | Producer |
| Costume & Make-Up | Ramon Gow | Hairdresser |
| Art | Andrew Campbell | Set Decoration |
| Production | Terry Nation | Producer |
| Art | Maurice Carter | Art Direction |
| Directing | Michael Dryhurst | Assistant Director |
| Sound | Rene Borisewitz | Sound Recordist |
| Camera | Ian Wilson | Director of Photography |
| Costume & Make-Up | Jill Carpenter | Makeup Artist |
| Production | Edward Joseph | Production Supervisor |
| Sound | Ken Barker | Sound Recordist |
| Camera | Neil Binney | Camera Operator |
| Production | Beryl Vertue | Executive Producer |
| Editing | Bill Blunden | Editor |
| Costume & Make-Up | Judy Moorcroft | Costume Design |
| Writing | Terry Nation | Writer |
