Eddy en Stuart delen een studentenwoning. Door een misverstand in de administratie wordt Alex, een studente, hun derde kamergenoot. Al snel valt Alex voor de rustige Eddy, en Stuart ziet Alex wel zitten. Eddy zit in de knoop met z'n homoseksuele gevoelens en daarbij gaat hij nog eens warme gevoelens koesteren voor Stuart. De drie kunnen het als vrienden goed met elkaar vinden, maar sommige gevoelens gaan voor problemen zorgen.
Nee, helaas is Threesome nog niet beschikbaar op Netflix in Nederland.
| Editing | William C. Carruth | Editor |
| Directing | Andrew Fleming | Director |
| Production | Brad Krevoy | Producer |
| Camera | Alexander Gruszynski | Director of Photography |
| Directing | Phil Robinson | Second Assistant Director |
| Art | Ivo Cristante | Production Design |
| Costume & Make-Up | Deborah Everton | Costume Design |
| Costume & Make-Up | Patty York | Key Makeup Artist |
| Sound | Bill Bernstein | Music Editor |
| Sound | Thomas Newman | Original Music Composer |
| Production | David Stein | Associate Producer |
| Writing | Andrew Fleming | Writer |
| Sound | Giovanni Di Simone | Sound Mixer |
| Crew | BJ Davis | Stunt Coordinator |
| Art | Ken Larson | Art Direction |
| Art | Tim Colohan | Set Decoration |
| Crew | Ralph Sall | Executive Music Producer |
| Sound | William C. Carruth | Supervising Sound Editor |
| Costume & Make-Up | Clare M. Corsick | Key Hair Stylist |
| Crew | George Gale | Post Production Supervisor |
| Sound | David C. Eichhorn | Sound Effects Editor |
| Sound | Jeffrey Pollack | Music Consultant |
| Camera | Bruce Alan Greene | Steadicam Operator |
| Production | Ed Mitchell | Casting |
| Production | Robyn Ray | Casting |
| Directing | Jack Breschard | First Assistant Director |
| Art | Eric London | Set Dresser |
| Directing | Richard J. Levin | Second Assistant Director |
| Production | Tracie Graham-Rice | Unit Production Manager |
| Sound | Paul Vik Marshall | Boom Operator |
| Costume & Make-Up | Sonya Ooten | Wardrobe Supervisor |
| Directing | Martin Kitrosser | Script Supervisor |
| Directing | Robert A. Neft | Second Second Assistant Director |
| Camera | Jacek Laskus | Director of Photography |
| Sound | Tom Caton | Boom Operator |
| Costume & Make-Up | Brenna Gibson | Costumer |
| Camera | David Garden | Second Assistant Camera |
| Sound | James Battersby | Boom Operator |
| Camera | Katherine M. Butler | First Assistant Camera |
| Directing | Robin Winter | Second Second Assistant Director |
| Camera | Chris Lombardi | First Assistant Camera |
| Sound | Mark Weingarten | Production Sound Mixer |
| Art | Raymond Consign | Storyboard Artist |
| Directing | Kate Morrison | Script Supervisor |
| Camera | Ray Milazzo | Second Assistant Camera |
| Directing | Jack S. Krevoy | Second Second Assistant Director |
| Directing | Matt Hinkley | First Assistant Director |
| Art | Tim Colohan | Art Direction |
| Art | Bill Staples | Set Decoration |
| Production | Mike Johnson | Extras Casting |
| Camera | Abe Perlstein | Still Photographer |
| Production | Jennifer Sloan | Casting Assistant |
| Sound | Lynn Bopeley | Boom Operator |
| Sound | Frank Fleming | Sound Recordist |
| Sound | Jill Schachne | Foley Artist |
| Costume & Make-Up | Cheryl Voss | Key Makeup Artist |
| Editing | Tom Dailey | Assistant Editor |
| Production | Dawn K. Thomas | Production Coordinator |
| Costume & Make-Up | Eryn Krueger Mekash | Makeup & Hair Assistant |
| Sound | Ron Bedrosian | Foley Mixer |
| Sound | Richard D. Rogers | Sound Re-Recording Mixer |
| Sound | Robert W. Glass Jr. | Sound Re-Recording Mixer |
| Sound | Bill Bell | Foley Supervisor |
| Sound | Tim Chilton | Foley Artist |
| Directing | BJ Davis | Second Unit Director |
| Production | Tracie Graham-Rice | Line Producer |
| Production | Steven Stabler | Producer |
| Production | Bradley Jenkel | Co-Producer |
| Production | Cary Woods | Executive Producer |
