Caged Heat (1974)

Director: Jonathan Demme
Cast: Barbara Steele, Cheryl Smith, Crystin Sinclaire, Ella Reid, Erica Gavin, Juanita Brown, Roberta Collins, Warren Miller

Synopsis:

A young woman is convicted on drug offenses and sent to a women’s penitentiary run by a repressed and oppressive female warden. When the prison’s sadistic doctor begins conducting illegal “therapeutic” experiments on the inmates, the ladies plot their revenge.