A team of two-fisted insurance investigators (one of whom disguises himself as The Masked Marvel) endeavor to discover and thwart the loathsome saboteur Sakima.
| Directing | Spencer Gordon Bennet | Director |
| Writing | Royal K. Cole | Screenplay |
| Writing | Ronald Davidson | Screenplay |
| Writing | Basil Dickey | Screenplay |
| Writing | Jesse Duffy | Screenplay |
| Writing | Grant Nelson | Screenplay |
| Writing | George H. Plympton | Screenplay |
| Writing | Joseph F. Poland | Screenplay |
| Production | William J. O'Sullivan | Producer |
| Editing | Wallace Grissell | Editor |
| Editing | Earl Turner | Editor |
| Costume & Make-Up | Ern Westmore | Makeup Artist |
| Crew | Howard Lydecker | Special Effects |
| Crew | Theodore Lydecker | Special Effects |
| Crew | John Daheim | Stunts |
| Crew | Bud Geary | Stunts |
| Crew | Fred Graham | Stunts |
| Crew | Duke Green | Stunts |
| Crew | Charles Hutchison | Stunts |
| Crew | Thom Metzetti | Stunts |
| Crew | Betty Miles | Stunts |
| Crew | Eddie Parker | Stunts |
| Crew | Preston Peterson | Stunts |
| Crew | Allen Pomeroy | Stunts |
| Crew | Tom Steele | Stunts |
| Crew | Dale Van Sickel | Stunts |
| Crew | Joe Yrigoyen | Stunts |
| Camera | Reggie Lanning | Director of Photography |
| Crew | Ken Terrell | Stunts |
| Sound | Mort Glickman | Original Music Composer |
