Knock Knock (2015)

Knock Knock parents guide

For an R, this one goes further: strong sex and nudity. Beyond that, a few tense moments and a jolt or two.

Scare

Mildly scary

A few tense or eerie moments.

Jump scares

A couple

One or two sudden jolts.

Gore

Graphic gore

Blood and wounds shown clearly.

Violence

Strong violence

Violence is frequent or intense.

Sex and nudity

Strong

Strong means explicit or repeated sex, extended nudity, or sexual assault shown on screen, attempted or completed, even partly off screen. Any one of these is enough.

Language

Moderate

Some strong profanity, a few f-words.

How we rate: an AI reads what is known about each title and tags it 0 to 3; we check the tags against a hand-rated set and correct them by hand when readers tell us. Estimates, not a scene-by-scene review. Spot a mistake? Tell us.

Three questions

Is Knock Knock scary?

Only a little. Knock Knock has a few tense moments, nothing that follows you to bed.

How gory is Knock Knock?

Graphic gore and strong violence. If graphic gore is a dealbreaker, skip it.

What is Knock Knock rated, and is it OK for kids?

It is an R, with strong sex and nudity, strong violence, and some strong language. Keep it for adults.

What is Knock Knock about?

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.

Cast and crew

More like Knock Knock

• Reservoir Dogs (1992)Gritty · graphic gore · brutal violence · emotionally heavyA botched jewel heist unravels into a darkly comic, bloody standoff among double-crossing criminals.
• Obsession (2026)Properly scary · extreme gore · brutal violence · emotionally heavyA hopeless romantic's wish for love turns chillingly dark, as desire comes with a sinister, pulpy price.
• The Silence of the Lambs (1991)Properly scary · graphic gore · strong violence · emotionally devastatingA brilliant, imprisoned psychopath offers chilling insights into a serial killer's mind, if a young agent dares to listen.
• Psycho (1960)Properly scary · light gore · strong violence · emotionally heavyA woman on the run finds a chilling, atmospheric motel where dread steadily builds to a shocking twist.
• The Departed (2006)Gritty · graphic gore · brutal violence · emotionally devastatingUndercover lives collide in a gritty, relentless game of cat and mouse within Boston's criminal underworld.
• Pulp Fiction (1994)Darkly comic · graphic gore · strong violence · emotionally heavyHitmen, molls, and boxers collide in a sprawling, darkly comic crime saga that twists through time.
• The Dark Knight (2008)Suspenseful · light gore · strong violence · emotionally heavyA relentless, gritty crime thriller where a hero's war on chaos takes a darkly comic and epic turn.
• The Usual Suspects (1995)Suspenseful · light gore · strong violence · emotionally heavyA low-level con man's intricate tale of a mythic crime lord unravels with gritty, suspenseful precision.

Knock Knock is on our Horror on Max, Thriller on Max and Crime on Max lists.

More like this feeling

Prompts we typed into CouchRot, and the lists that share its tags.

• “a horror movie that's actually scary”
• “scary but not gory”
• “a thriller with a twist, no spoilers”

Lists with the same feel: Horror, not scary.