Knock Knock (2008) is a Horror film that follows knock Knock is a horror film that combines fear with revenge, hate with justice and responsibility with sacrifice. The bible says an "Eye for an Eye." Rico was just a big fun loving son of a hard working neighborhood business man. The problem is his dad is an undertaker. Some popular high school Students thought he was weird because of it. Rico kept to himself... Knock Knock is not currently listed with streaming providers in your selected region, but availability can change over time. It has a user rating of 4.3 out of 10 from 29 votes. Fans of horror movies may also want to explore similar titles below.