After a country family of five take in charming cousin Julie, whose parents recently died in a car crash, their teenage daughter Rachel grows to suspect that Julie has a sinister agenda.
| Actor | Role |
|---|---|
 Linda BlairRachel Bryant | Rachel Bryant |
 Lee PurcellJulia Trent | Julia Trent |
 Jeremy SlateTom Bryant | Tom Bryant |
| JJeff McCrackenMike Gallagher | Mike Gallagher |
 Jeff EastPeter Bryant | Peter Bryant |
 Carol LawrenceLeslie Bryant | Leslie Bryant |
 Macdonald CareyProfessor Jarvis | Professor Jarvis |
 Fran DrescherCarolyn Baker | Carolyn Baker |
| JJames JarniganBobby | Bobby |
 Sierra PecheurNurse Duncan | Nurse Duncan |
 Billy BeckSheriff | Sheriff |
 Patricia WilsonMrs. Gallagher | Mrs. Gallagher |
 Gwil RichardsDr. Morgan | Dr. Morgan |
| FFrederick RuleMailman | Mailman |
| HHelena MäkeläBeverly Hills Lady | Beverly Hills Lady |
| NNicole KellerElizabeth | Elizabeth |
 John SteadmanVet | Vet |
| KKerry ArquetteAnne | Anne |
| KKim WellsFemale Rider | Female Rider |
| BBeatrice ManleyMarge Trent | Marge Trent |
| TThomas McGowanCowboy Don | Cowboy Don |
 Ed WrightMr. Wilson | Mr. Wilson |