Four couples, all friends, descend on a tropical island resort. Though one husband and wife are there to work on their marriage, the others just want to enjoy some fun in the sun. They soon find, however, that paradise comes at a price: Participation in couples therapy sessions is mandatory. What started out as a cut-rate vacation turns into an examination of the common problems many face.
| Writing | Vince Vaughn | Screenplay |
| Directing | Peter Billingsley | Director |
| Writing | Dana Fox | Screenplay |
| Writing | Jon Favreau | Screenplay |
| Production | Claire Schwob | Location Manager |
| Production | Christine Tisseau Giraudel | Location Manager |
| Sound | A. R. Ameen | Playback Singer |
| Sound | A.R. Rahman | Original Music Composer |
| Production | Sarah Halley Finn | Casting Director |
| Art | Daniel B. Clancy | Set Decoration |
| Production | Victoria Vaughn | Executive Producer |
| Editing | Dan Lebental | Editor |
| Camera | Eric Alan Edwards | Director of Photography |
| Art | Shepherd Frankel | Production Design |
| Production | Vince Vaughn | Producer |
| Costume & Make-Up | Simone Almekias-Siegl | Key Makeup Artist |
| Production | Scott Stuber | Producer |
| Art | Curt Beech | Art Direction |
| Art | Clint Wallace | Art Direction |
| Production | Guy Riedel | Executive Producer |
| Costume & Make-Up | David Danon | Key Hair Stylist |
| Costume & Make-Up | Susan Matheson | Costume Design |
| Production | Randi Hiller | Casting Director |
| Production | John Isbell | Co-Producer |
| Crew | Christian Eric Billings | Stunt Driver |
| Production | Dana Fox | Associate Producer |
| Crew | Daniel F. Malone | Stunt Coordinator |
| Production | Udi Nedivi | Associate Producer |
| Crew | Joe Bucaro III | Stunt Coordinator |
| Crew | Marc C. Geschwind | Utility Stunts |
| Crew | Jessica Harbeck | Stunt Double |
| Production | Sandra J. Smith | Associate Producer |
| Crew | Brad Martin | Stunts |
| Production | Micah Mason | Associate Producer |
| Sound | John O'Brien | Music Supervisor |
| Production | Udi Nedivi | Unit Production Manager |
| Directing | Rip Murray | First Assistant Director |
| Directing | Christina Fong | Second Assistant Director |
| Art | Calla Klessig | Assistant Art Director |
| Art | Shanna Starzyk | Assistant Art Director |
| Art | Julie Smith | Assistant Set Decoration |
| Art | Sarah Contant | Set Designer |
| Art | Al Hobbs | Set Designer |
| Art | Easton Michael Smith | Set Designer |
| Art | Kevin Cross | Set Designer |
| Sound | Steve Cantamessa | Sound Mixer |
| Costume & Make-Up | Elaine Perlmann | Assistant Costume Designer |
| Costume & Make-Up | Wendy M. Craig | Costume Supervisor |
| Costume & Make-Up | Steve Artmont | Makeup Department Head |
| Costume & Make-Up | Simone Almekias-Siegl | Makeup Artist |
| Costume & Make-Up | Cheryl Ann Nick | Makeup Artist |
| Directing | Trudy Ramirez | Script Supervisor |
| Editing | Matt Evans | Additional Editing |
| Sound | Steve Pederson | Sound Re-Recording Mixer |
| Sound | Brad Sherman | Sound Re-Recording Mixer |
| Sound | Terry Rodman | Supervising Sound Editor |
| Sound | David Wolowic | Assistant Sound Editor |
| Sound | Steve Mann | Sound Editor |
| Art | Andrew Murdock | Art Direction |
| Costume & Make-Up | Gabriel De Cunto | Makeup Artist |
| Visual Effects | Jamie Dixon | Visual Effects Supervisor |
| Visual Effects | Les Hunter | Visual Effects Producer |
| Visual Effects | Lynn Gephart | Visual Effects Producer |
| Crew | Clay Cullen | Stunts |
| Crew | Marilyn Giacomazzi | Stunts |
