Devil Dog: The Hound of Hell1978

Horror Vault's take

When a seemingly ordinary dog joins an all-American suburban household, strange and disturbing events begin to plague the family from within. What appears to be a loyal pet harbors something far darker — a sinister connection to the forces of Hell itself. This late-70s TV movie trades on the era's fascination with diabolical horror, pitting a wholesome family against an evil they never expected to invite through their front door.

Content: Mild Horror Violence, Threat To Children, Animal-Related Menace