Bound together by a desire to play "Mazes and Monsters," Robbie and his four college classmates decide to move the board game into the local cavern. Robbie loses his mind, and the line between reality and fantasy fuse into a harrowing nightmare.
| Actor | Role |
|---|---|
 Tom HanksRobbie Wheeling | Robbie Wheeling |
 Wendy CrewsonKate Finch | Kate Finch |
 David WallaceDaniel | Daniel |
 Chris MakepeaceJay Jay Brockway | Jay Jay Brockway |
 Lloyd BochnerHal | Hal |
 Peter DonatHarold | Harold |
 Anne FrancisEllie | Ellie |
 Murray HamiltonLt. John Martini | Lt. John Martini |
 Vera MilesCat | Cat |
 Louise SorelJulia | Julia |
 Susan StrasbergMeg | Meg |
| EEric FinkVideo Tech | Video Tech |
 Chris WigginsKing | King |
 Clark JohnsonPerry | Perry |
| TTom HarveyHayden | Hayden |
| JJames O'ReganPaul | Paul |
| KKevin FoxPunk | Punk |
| AAngelo RizacosPunk | Punk |
 Kevin Peter HallGorvil | Gorvil |
| JJames BeardenPolice Officer | Police Officer |
| MMarshall Jay KaplanTim - Bar Patron (uncredited) | Tim - Bar Patron (uncredited) |