Musical comedy star Betty Garrett goes dramatic big-time in the hostage drama Shadow on the Window. Betty plays Linda Atlas, the mother of seven-year-old Petey Atlas (portrayed by Jerry "The Beaver" Mathers). When Petey witnesses a murder committed by a trio of juvenile delinquents, he wanders off in a state of shock. The three punks (John Barrymore Jr., Corey Allen and Gerald Sarricini) kidnap Linda, who's also witnessed their crime, holding her prisoner to keep the boy from talking -- if and when he recovers. Meanwhile, the authorities launch a frenzied manhunt in search of the catatonic boy, led by Petey's dad, police officer Tony Atlas (Phil Carey).