Knock Knock

Movie review by Jeffrey Anderson, Common Sense Media
Knock Knock Poster Image

Common Sense says

age 18+

Horrible home-invasion thriller from Eli Roth.

R 2015 99 minutes

Parents say

age 18+

Based on 25 reviews

Kids say

age 17+

Based on 8 reviews

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A Lot or a Little?

The parents' guide to what's in this movie.

Community Reviews

age 18+

Another twisted Eli Roth flick…

This is very twisted, and surprisingly, Eli Roth still managed to make it overly scary even without a lot of blood. There is only one drop of blood in the entire movie, but it is still too graphic for anyone but adults. No kids of any age should see this. By far, the only good film directed by Eli Roth that I have seen is “Cabin Fever” from 2002. There is a very explicit sex scene in the movie, along with nonstop profanity and violence in the form of torture and fighting. There is a lot more emphasis on violence and peril in this film than a good storyline. Do not bother.

This title has:

Too much violence
Too much sex
Too much swearing
Too much drinking/drugs/smoking
age 16+

After Manson and Polanski, this is the film to see

I enjoyed this film with a lot of unease. Not because of the girls and the sex, but because, somewhere, deep in my psyche, there was a little bell ringing and telling me this man is doomed. The Manson affair in California came back to me in a flash and I realized that no one is safe in the immensity of California or for matter in the big South American city where the action was filmed. I have heard of teenage crazies and this film is a good reminder not to open your door after midnight or do it with your Taser in hand. I have been there and what I am telling you is true and real. Jean-Pierre de Villers

This title has:

Great role models

Movie Details

  • In theaters: October 9, 2015
  • On DVD or streaming: December 8, 2015
  • Cast: Keanu Reeves, Lorenza Izzo, Ana de Armas
  • Director: Eli Roth
  • Studio: Lionsgate
  • Genre: Thriller
  • Run time: 99 minutes
  • MPAA rating: R
  • MPAA explanation: disturbing violent behavior, strong sexual content, nudity and language
  • Last updated: July 3, 2022

Our Editors Recommend

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    Violent thriller has strong characters, lots of iffy stuff.

    age 17+
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    Gripping tale of manipulation has cursing, violence.

    age 17+
  • Panic Room Poster Image

    Panic Room

    Extreme suspense, graphic violence; not for kids.

    age 16+

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