As soon as Muffy St. John and her college friends arrive on her parents' secluded island, someone starts trimming the guest list... one murder at a time.
Unfortunately the movie April Fool's Day is not yet available on HBO Max.
| Writing | Danilo Bach | Writer |
| Directing | Fred Walton | Director |
| Crew | Martin Becker | Makeup Effects |
| Production | Frank Mancuso Jr. | Producer |
| Sound | Charles Bernstein | Original Music Composer |
| Camera | Charles Minsky | Director of Photography |
| Editing | Bruce Green | Editor |
| Production | Pamela Basker | Casting |
| Production | Fern Champion | Casting |
| Art | W. Stewart Campbell | Art Direction |
| Art | Della Mae Johnston | Set Decoration |
| Crew | Jim Gill | Makeup Effects |
| Crew | Bettie Kauffman | Makeup Effects |
| Crew | Christopher Swift | Makeup Effects |
| Costume & Make-Up | Martin Becker | Makeup Effects Designer |
| Crew | Martin Becker | Special Effects |
| Costume & Make-Up | Todd McIntosh | Makeup Department Head |
| Sound | Jonathan D. Evans | Sound Engineer |
| Sound | F. Hudson Miller | Sound Effects |
| Sound | David Lewis Yewdall | Sound Designer |
