The Resonator, a powerful machine that can control the sixth sense, has killed its creator and sent his associate into an insane asylum. When a psychiatrist becomes determined to continue the experiment, she unwittingly opens the door to a hostile parallel universe.
| Actor | Role |
|---|---|
 Jeffrey CombsCrawford Tillinghast | Crawford Tillinghast |
 Barbara CramptonDr. Katherine McMichaels | Dr. Katherine McMichaels |
 Ken ForeeBuford 'Bubba' Brownlee | Buford 'Bubba' Brownlee |
 Ted SorelDr. Edward Pretorius | Dr. Edward Pretorius |
 Carolyn Purdy-GordonDr. Roberta Bloch | Dr. Roberta Bloch |
 Bunny SummersNeighbor Lady | Neighbor Lady |
 Bruce McGuireJordan Fields | Jordan Fields |
 Del RusselAmbulance Driver | Ambulance Driver |
 Dale WyattParamedic | Paramedic |
 Andrew Lord MillerPatient - Strait Jacket | Patient - Strait Jacket |
| JJohn LeamerShock Technician | Shock Technician |
| RRegina BleeszBondage Girl | Bondage Girl |
| KKaren ChristenfeldNurse | Nurse |
 Albert BandDrunk (uncredited) | Drunk (uncredited) |