When the Earl of Gurney dies in a cross-dressing accident, his schizophrenic son, Jack, inherits the Gurney estate. Jack is not the average nobleman; he sings and dances across the estate and thinks he is Jesus reincarnated. Believing that Jack is mentally unfit to own the estate, the Gurney family plots to steal Jack's inheritance. As their outrageous schemes fail, the family strives to cure Jack of his bizarre behavior, with disastrous results.
Unfortunately the movie The Ruling Class is not yet available on HBO Max.
| Writing | Peter Barnes | Screenplay |
| Directing | Peter Medak | Director |
| Production | Jules Buck | Producer |
| Editing | Ray Lovejoy | Editor |
| Production | Jack Hawkins | Producer |
| Production | David Korda | Associate Producer |
| Camera | Ken Hodges | Director of Photography |
| Art | Peter Murton | Production Design |
| Costume & Make-Up | Ruth Myers | Costume Design |
| Production | Maude Spector | Casting |
| Costume & Make-Up | Ramon Gow | Hairstylist |
| Costume & Make-Up | Charles E. Parker | Makeup Designer |
| Production | Tim Hampton | Production Manager |
| Directing | Bill Westley | Second Assistant Director |
| Costume & Make-Up | Susie Hill | Hairdresser |
| Costume & Make-Up | Eric Allwright | Makeup Artist |
| Writing | Peter Barnes | Theatre Play |
| Directing | Bert Batt | Assistant Director |
| Sound | John Cameron | Original Music Composer |
| Sound | Robin Gregory | Sound Mixer |
