A group of young drifters kidnap wealthy businessman Roc Delmonico just for kicks. They keep him captive, demanding a ransom for his safe release. However there is no one - wife, Mafia associates or mother - willing to part with the $200,000 ransom. Demonico is dismayed that no one appears unduly concerned about his fate and joins forces with the kidnappers to plot his revenge, blackmailing his once nearest and dearest into parting with $3,000,000 in hush money.
Unfortunately the movie The Happening is not yet available on HBO Max.
| Writing | Ronald Austin | Screenplay |
| Writing | James D. Buchanan | Screenplay |
| Writing | James D. Buchanan | Story |
| Writing | Ronald Austin | Story |
| Directing | Elliot Silverstein | Director |
| Costume & Make-Up | Sherry Wilson | Hairstylist |
| Writing | Frank Pierson | Screenplay |
| Sound | Art Dunham | Music Editor |
| Crew | Willis Cook | Special Effects |
| Camera | James Latham | Grip |
| Directing | Charlsie Bryant | Script Supervisor |
| Costume & Make-Up | Jason S. Silverstein | Wardrobe Master |
| Production | Howard B. Jaffe | Associate Producer |
| Production | David Wolfson | Associate Producer |
| Costume & Make-Up | Marlana May | Makeup Artist |
| Production | Sam Spiegel | Producer |
| Costume & Make-Up | Gene Coffin | Costume Design |
| Costume & Make-Up | Irene Aparicio | Hairstylist |
| Lighting | Al Reiners | Gaffer |
| Art | Albert Brenner | Art Direction |
| Sound | Jack Haynes | Sound |
| Production | Jerry Porter | Location Manager |
| Art | Don K. Ivey | Set Decoration |
| Editing | Oscar Denenberg | Assistant Editor |
| Production | Robert Manchel | Associate Producer |
| Camera | Philip H. Lathrop | Director of Photography |
| Costume & Make-Up | George Fields | Makeup Artist |
| Directing | Robert Altman | Second Unit Director |
| Crew | Howard Winner | Second Unit Cinematographer |
| Production | Russell Saunders | Production Manager |
| Art | Jack Johnson | Props |
| Production | Jud Kinberg | Producer |
| Editing | Philip W. Anderson | Editor |
| Art | Richard Day | Production Design |
| Directing | Ray Gosnell Jr. | Assistant Director |
| Sound | Frank De Vol | Original Music Composer |
| Directing | Tim Zinnemann | Assistant Director |
| Sound | Howard Warren | Sound |
