KNOCK KNOCK Knocking on his university dorm door awakes a young man in the dead of night. What is behind the door? Why is there knocking? And most importantly, Who is behind it?

A young lady is about to hang her new antique mirror to the wall when someone mysteriously leaves a box on her doorstep. As she gets ready to open it, knocks start to spread around in her apartment. Who is it? Or should we say what is it?

After receiving a stone engraved with a strange symbol, Brenda hears a knock at her door.

When "Someone" Knock on Your Door in The Middle of The Night, Do Not Open!

Assigned to a missing person case, reporter Trish Bostwick follows the trail to a secluded asylum hidden in the New England woods, but everything changes when a knife-wielding stranger hijacks her car, plunging her into a descent of paranoia and madness.

A reporter arrives in Rijeka and is placed in a hotel room numbered 23 where he also meets a mysterious roommate with a shady past. His arrival in the city coincides with the dissappearence of a famous local musical artist. His interest sufficiently piqued, he starts an amateur investigation of his own, which traps him in the inescapable clutches of the city's criminal underworld, putting the life and safety of both him and his family at risk.

A once-esteemed psychiatrist helplessly watches her life spiral into a nightmarish maelstrom of supernatural hysteria and gruesome deaths, all linked to a seemingly unstoppable ancient curse.

Yoo-ra suffers from nightmares every night. One day she meets her high school friends. Jin-tae is a promising artist, In-seok is a chaebol and former thug, Hye-jin likes In-seok, and Seong-ho, who used to be In-seok's errand boy, finally meet up. Yoo-ra asks her friends if they remember the classmate that killed herself. Everyone is flustered and claims they don't. Yoo-ra goes to the bathroom, but passes out after seeing herself in the mirror. Everyone gets in In-seok's car to send Yoo-ra home, but they get into an accident and all become unconscious. When they wake up, they are at a familiar school that's closed. It was the school they went to that has closed down.

The teenager Madison McBride is traumatized by the loss of her deranged father when she was nine years old and the suicide of her beloved brother Brandon one year ago. She decides to join the Richard Miller University, where Brandon committed suicide, to overcome her demons. While walking to her dorm, she meets the weird janitor Wilbur Mackey that tells her that the place is haunted.

A reporter is murdered while driving to his job. The Police are contacted by a clairvoyant who saw the death in a vision, but some dark force is preventing him from seeing the man behind the crime...

The supposedly dead and buried Mabuse returns to his criminal activities, as his longtime foe Police Inspector Lohmann, a dauntless girl reporter, and an American - who may be an FBI agent, or maybe a Chicago mobster - investigate a series of gruesome murders connected to a maximum security prison and involving a minister who has written a book called "The Anatomy Of The Devil".

Strange things happen in a revue theatre. The dancer Maria seems to be hunted by an invisible admirer. When the body of a probable FBI agent is found in a trunk the police asks FBI man Joe Como for help. Como gets interested in the revue theatre and an ominous transport firm soon. When he is receiving mysterious threatening letters he is sure that Dr. Mabuse has risen again. But what is going on at "Enterprise X" so that both the goverment and the mad genius in crime are interested in it?