The Hilliards are a middle class family whose lives are put in danger when escaped convict Glenn Griffin invades their home. Griffin is crazed, tormenting the Hilliards with his meek brother Hank and sadistic Robish.

Michael Conrad
as Sam Robish

Arthur Hill
as Dan Hilliard

Yvette Mimieux
as Cindy Hilliard

Barry Primus
as Hank Griffin

George Segal
as Glenn Griffin

Dolph Sweet
as Jesse Bard

Ralph Waite
as Lt. Fredericks

Teresa Wright
as Eleanor Hilliard

Michael Kearney
as Ralphie Hilliard

Graham Jarvis
as