Cast & crew
What Waits Below (1984)
Directed by Don Sharp Written by Freddie Francis, Robert Vincent O'Neil, Christy Marx
Cast
| Robert Powell | Rupert 'Wolf' Wolfsen |
| Timothy Bottoms | Major Elbert Stevens |
| A.C. Weary | Lt. George Barwell |
| Lisa Blount | Leslie Peterson |
| Anne Heywood | Frieda Shelley |
| Richard Johnson | Ben Gannon |
| Dick Curtis | Lemurian |
| William Gribble | Sgt. Neumann |
| Carl Spurlock | Major Castillo |
| Gary Carlos Cervantes | Hector Lopez |
| Jackson Bostwick | Hunter Prime |
| Richard Beauchamp | Santos Arias |
| Liam Sullivan | Lemurian Elder |
| Jason Laskay | Hunter Second |
| David Avery | American Soldier |
| Tim Powell | Jim White |
| Rick Davis | Mercenary |
| Janine Stamler Jordan | Mercenary |
| Kenny Moore | Lemurian |
| Brian Stevens | American Soldier |
| Pamela Hallisey Hiss | Lemurian (uncredited) |
| Ned Vaughn | American Soldier |
Crew
| Don Sharp | Director |
| Sandy Howard | Producer |
| Robert D. Bailey | Producer |
| Michel Rubini | Original Music Composer |
| Victoria Plummer | Production Coordinator |
| Jim Garrard | Casting |
| John R. Bowey | Editor |
| Freddie Francis | Story |
| Denny Jaeger | Original Music Composer |
| Jeffrey M. Sneller | Associate Producer |
| Mel Pearl | Executive Producer |
| Stephen Marsh | Art Direction |
| Don Levin | Executive Producer |
| Pamela Hallisey Hiss | Makeup Artist |
| Robert Vincent O'Neil | Screenplay |
| Doug Bledsoe | Stunts |
| Clarke Coleman | Stunts |
| Virgil L. Harper | Director of Photography |
| David Lee | Sound Mixer |
| Craig Felburg | Sound Mixer |
| Christy Marx | Screenplay |
| Ron Bledsoe | Stunt Coordinator |
| Bret Culpepper | Special Effects |
| Mike Bledsoe | Stunts |