 | Bruce Lee | | Billy Lo / Hai Tien (original 1972 footage) |
| Gig Young | | Jim Marshall |
| Dean Jagger | | Dr. Land |
| Hugh O'Brian | | Steiner |
| Colleen Camp | | Ann Morris |
| Robert Wall | | Carl Miller |
| Mel Novak | | Stick |
| Kareem Abdul-Jabbar | | Hakim / Mantis (original 1972 footage) |
| Chuck Norris | | Fighter |
| Dan Inosanto | | Pasqual / Third Floor Guardian (original 1972 footage) |
| Billy McGill | | John |
| Sammo Kam-Bo Hung | | Lo Chen |
| Roy Chiao | | Henry Lo |
| Tony Chiu-Wai Leung | | David |
| Jim James | | Surgeon |
| Russell Cawthorne | | Doctor |
| David Hu | | Businessman 1 |
| Peter Gee | | Businessman 2 |
| Don Barry | | Boat Captain / Hakim (double) |
| Jess Hardie | | Record Producer |
| Eddie Lye | | Director |
| Peter Nelson | | Assistant Director |
| Tae-jeong Kim | | Billy Lo |
| Yuan Chieh | | Fighter accomplice (original 1972 footage) |
| Han Jae Ji | | Restaurant Fighter / Quarter Floor Guardian (original 1972 footage) |
| James Tien | | Charlie Wang / Fighter accomplice antagonist (original 1972 footage) |
| Ho Wang | | Lau Yea-chun |
| Bolo Yeung | | |
| Biao Yuen | | Billy Lo / Biker in black |
| Robert Baker | | Fighter (closing credits) |
| Stephen Chang | | Ming Tao |
| Robert Clouse | | Carl's Second #1 |
| Warwick Paul Evans | | Ringside Commentator |
| Ing-Sik Whang | | First Floor Guardian (original 1972 footage) |
| Christopher Kent | | Billy Lo |
| Robert Kerver | | |
| Taky Kimura | | |
| John Ladalski | | Carl Miller's second |
| Ching-Ying Lam | | Macau fighter |
| Kun Li | | |
