Based on Harold Pinter's enigmatic play about a boarder in a British seaside dwelling who is visited by two strangers. They torment him verbally, ask him idiotic unanswerable questions, force him to sit down and stand up, and give him a "party". Then, eventually, they take him away, a tongue-tied idiot. The trivial becomes the terrible, and with it a certain wonder, a certain pity.
Unfortunately the movie The Birthday Party is not yet available on HBO Max.
| Directing | William Friedkin | Director |
| Writing | Harold Pinter | Screenplay |
| Writing | Harold Pinter | Theatre Play |
| Camera | Denys N. Coop | Director of Photography |
| Production | Milton Subotsky | Producer |
| Production | Max Rosenberg | Producer |
| Production | Edgar J. Scherick | Executive Producer |
| Editing | Antony Gibbs | Editor |
| Production | Teresa Bolland | Production Manager |
| Art | Edward Marshall | Art Direction |
| Directing | Andrew Grieve | Assistant Director |
| Sound | Norman Bolland | Sound Recordist |
| Costume & Make-Up | Eddie Knight | Makeup Artist |
| Sound | Alan Pattillo | Sound Editor |
| Sound | Jim Roddan | Sound Editor |
| Camera | Alan Hall | Camera Operator |
