 | French Stewart als John Brown / Inspector Gadget |
 | Elaine Hendrix als G2 |
 | Tony Martin als Sanford Scolex / Dr. Claw |
 | Caitlin Wachs als Penny |
 | Mark Mitchell als Chief Quimby |
 | Sigrid Thornton als Mayor Wilson |
 | Bruce Spence als Baxter |
 | Alethea McGrath als Mrs. Quimby |
 | John Batchelor als McKibble |
 | James Wardlaw als Brick |
 | Nick Lawson als Squint |
 | Jeff Bennett als Brain the Dog (voice) |
 | Todd Levi als Anchorman |
 | D.L. Hughley als Gadgetmobile (voice) |
 | Mungo McKay als Bartender |
 | Mick Roughan als Jungle Bob |
 | Siros Niaros als The Ninja |
 | Brian McDermott als Mr. Morgan |
| Kate Peters als Dating Service Woman |
| Roger Birnbaum | Executive Producer |
| Alex Zamm | Director |
| David Roessell | Executive Producer |
| Ron Anderson | Writer |
| William Robertson | Writer |
| Andy Heyward | Executive Producer |
| Peter M. Green | Producer |
| Jean Chalopin | Executive Producer |
| Jordan Kerner | Executive Producer |
| Alex Zamm | Writer |
| Andy Heyward | Characters |
| Jean Chalopin | Characters |
| Charles Hirschhorn | Producer |
| Bruno Bianchi | Characters |
| Amy Lippens | Casting |
| Chris Hajian | Music |
| Geoffrey Wharton | Director of Photography |
| Francesco Biffone | Camera Operator |
| Simon Cardwell | Still Photographer |
| Mark Goellnicht | Camera Operator |
| Mark Goellnicht | Steadicam Operator |
| Steve Newman | Second Unit Director of Photography |
| John Platt | Camera Operator |
| Carolina Häggström | Script Supervisor |
| Peter Madamba | Script Researcher |
| Fiona McMaster | Casting Assistant |
| Maura Fay | Casting |
| Nathan Lloyd | Additional Casting |
| Kym Pierro | Extras Casting Assistant |
| Meredith B. Robinson | Casting Associate |
| Deborah Sutherland | Production Accountant |
| Bruce Shapiro | Dialogue Coach |
| Rhonda Fortescue | Assistant Accountant |
