Jean Claude Van Damme plays a dual role as Alex and Chad, twins separated at the death of their parents. Chad is raised by a family retainer in Paris, Alex becomes a petty crook in Hong Kong. Seeing a picture of Alex, Chad rejoins him and convinces him that his rival in Hong Kong is also the man who killed their parents. Alex is suspicious of Chad, especially when it comes to his girlfriend.
You can now watch Double Impact online on the following streaming providers in the United States.
| Directing | Sheldon Lettich | Director |
| Writing | Sheldon Lettich | Screenplay |
| Writing | Jean-Claude Van Damme | Screenplay |
| Production | Ashok Amritraj | Producer |
| Production | Paul Michael Glaser | Producer |
| Production | Jean-Claude Van Damme | Producer |
| Production | Moshe Diamant | Executive Producer |
| Sound | Arthur Kempel | Original Music Composer |
| Camera | Richard H. Kline | Director of Photography |
| Editing | Mark Conte | Editor |
| Crew | Peter Malota | Stunts |
| Crew | Peter Malota | Martial Arts Choreographer |
| Crew | Vic Armstrong | Stunt Coordinator |
| Crew | Vic Armstrong | Martial Arts Choreographer |
| Directing | Vic Armstrong | Action Director |
| Crew | John Cheung Ng-Long | Stunt Coordinator |
| Crew | John Cheung Ng-Long | Martial Arts Choreographer |
| Directing | John Cheung Ng-Long | Action Director |
| Crew | James Lew | Stunt Coordinator |
| Crew | James Lew | Martial Arts Choreographer |
| Crew | Danny Wong | Stunts |
| Crew | Mark Stefanich | Stunt Double |
| Crew | Bill M. Ryusaki | Stunts |
| Crew | Vernon Rieta | Stunts |
| Crew | Simon Rhee | Stunts |
| Crew | James Lew | Stunts |
| Crew | Will Leong | Stunts |
| Crew | Al Leong | Stunts |
| Crew | Peter Lai | Stunts |
| Crew | Darryl Chan | Stunts |
| Crew | Jordi Casares | Stunts |
| Crew | Georges Bejue | Stunt Double |
| Crew | Dickey Beer | Stunts |
| Writing | Peter Krikes | Screenstory |
| Writing | Steve Meerson | Screenstory |
| Writing | Jean-Claude Van Damme | Screenstory |
| Writing | Sheldon Lettich | Screenstory |
| Production | Charles Layton | Executive Producer |
| Production | James F. Tarzia | Casting |
| Art | John Jay Moore | Production Design |
| Costume & Make-Up | Joseph A. Porro | Costume Design |
| Writing | Jean-Claude Van Damme | Story |
| Writing | Sheldon Lettich | Story |
| Writing | Peter Krikes | Story |
| Writing | Steve Meerson | Story |
| Production | Michael Douglas | Co-Producer |
| Production | Sheldon Lettich | Co-Producer |
| Production | Terry Carr | Co-Producer |
| Art | Okowita | Art Direction |
| Art | Suzette Sheets | Set Decoration |
| Costume & Make-Up | Janice Alexander | Hairstylist |
| Costume & Make-Up | Joseph A. Porro | Costume Designer |
| Costume & Make-Up | Zoltan Elek | Makeup Artist |
| Production | Avram Butch Kaplan | Executive In Charge Of Production |
| Production | Charles Wang | Associate Producer |
| Production | Rick Nathanson | Supervising Producer |
| Production | Kamel Krifa | Associate Producer |
| Directing | James Lansbury | Second Assistant Director |
| Directing | Thomas J. Mack | First Assistant Director |
| Directing | Vic Armstrong | Second Unit Director |
| Directing | Andy Armstrong | Second Unit Director |
| Art | Michael Vojvoda | Set Dresser |
| Sound | Itzhak Magal | Production Sound Mixer |
| Sound | Patrick Cyccone Jr. | Sound Re-Recording Mixer |
| Sound | Allen L. Stone | Sound Re-Recording Mixer |
| Sound | Robert Thirlwell | Sound Re-Recording Mixer |
| Sound | Craig S. Jaeger | Sound Effects Editor |
| Sound | Robert Waxman | Sound Effects Editor |
| Sound | Stephen Bushelman | Sound Effects Editor |
| Sound | Sam F. Shaw | Sound Effects Editor |
| Sound | Jerry Stanford | Sound Effects Editor |
| Crew | Arthur Wai Kit Lau | Special Effects |
| Camera | Peter Jensen | Steadicam Operator |
| Camera | Dan Kneece | Steadicam Operator |
| Lighting | Robert Eyslee | Gaffer |
| Camera | Cliff Lipson | Still Photographer |
| Camera | Raymond Lam Fai-Tai | Steadicam Operator |
| Camera | Howard Wexler | Additional Camera |
| Camera | Jürg V. Walther | Camera Operator |
| Camera | Richard Merryman | Camera Operator |
| Camera | Jeff Mart | Steadicam Operator |
| Camera | Michael Gfelner | First Assistant Camera |
| Camera | Kirk Bloom | Second Assistant Camera |
| Camera | Picha Srisansanee | Second Assistant Camera |
| Lighting | Raymond Gonzales | Electrician |
| Camera | Todd Dos Reis | Second Assistant Camera |
| Camera | Ruurd M. Fenenga | First Assistant Camera |
| Lighting | Jesse Mather | Best Boy Electric |
| Editing | David Orr | Color Timer |
| Directing | Elizabeth S. Barton | Script Supervisor |
| Crew | Jean-Claude Van Damme | Fight Choreographer |
| Production | Brad Arensman | Executive In Charge Of Post Production |
| Art | Lars Petersen | Construction Coordinator |
| Art | Gae S. Buckley | Assistant Art Director |
| Costume & Make-Up | Katalin Elek | Assistant Makeup Artist |
| Costume & Make-Up | Karen Asano-Myers | Assistant Hairstylist |
