After several people and a dog are found dead in their closets a "mild-mannered" reporter, a college professor, her son and a befuddled professor band together to uncover the mystery but not without involving the U.S. Army and mass panic.
| Actor | Role |
|---|---|
| DDonald GrantRichard Clark | Richard Clark |
| DDenise DuBarryProfessor Diane Bennett | Professor Diane Bennett |
 Henry GibsonDr. Philip Pennyworth | Dr. Philip Pennyworth |
 Paul Walker'Professor' Bennett | 'Professor' Bennett |
 Claude AkinsSheriff Sam Ketchem | Sheriff Sam Ketchem |
 Howard DuffFather Martin Finnegan | Father Martin Finnegan |
 Donald MoffatGeneral Franklin Turnbull | General Franklin Turnbull |
 Paul DooleyRoy Crane | Roy Crane |
 John CarradineOld Joe Shempter | Old Joe Shempter |
 Frank AshmoreScoop Johnson | Scoop Johnson |
 Stella StevensMargo Crane | Margo Crane |
 FergieLucy | Lucy |
 Kevin Peter HallThe Monster | The Monster |
| KKenneth KesslerVoice | Voice |
 Jesse WhiteBen | Ben |
 Ritchie MontgomeryDeputy Spiro | Deputy Spiro |
| JJames AroneSoldier | Soldier |
 Benny BakerMr. McGinty | Mr. McGinty |
 Doc DuhameDeputy Conner | Deputy Conner |
 Arthur TaxierTelevision Newscaster | Television Newscaster |
 Clare ToraoTelevision Newscaster | Television Newscaster |
| BBrad KestenRex | Rex |
 Evan ArnoldBeaver | Beaver |
 Corky PigeonDanny | Danny |