Knock Knock (2015) is a Horror, Thriller film that follows when a devoted husband and father is left home alone for the weekend, two stranded young women unexpectedly knock on his door for help. What starts out as a kind gesture results in a dangerous seduction and a deadly game of cat and mouse. Currently, you can watch Knock Knock on Amazon Prime Video, Amazon Prime Video with Ads, Amazon Video, Apple TV Store. Streaming availability may vary by country and platform over time. It has a user rating of 5.4 out of 10 from 3,442 votes. Fans of horror movies may also want to explore similar titles below.