Easygoing but psychotic Dennis (Anthony Perkins) is released from jail, where he has served a sentence for his complicity in a suspicious death. Wandering through an Ozzie & Harriet-type small town, Dennis befriends apparently normal high school A-student Sue Ann (Tuesday Weld). He fills her head with lies about his imaginary career as a secret agent. She is thrilled, and makes up her mind to join him in his further adventures. But first, she takes time out to calmly shoot her mother to death! This jet-black whos manipulating who? seriocomedy was adapted by Lorenzo Semple Jr. from Stephen Gellers novel She Let Him Continue. ~ Hal Erickson, All Movie Guide