Unknown Person
In 5 titles on Horrorometer
As Cast

A strange doorway appears in the basement of a furniture showroom.
Backrooms

After finding an ad online for “video work,” Sara, a video artist whose primary focus is creating intimacy with lonely men, thinks she may have found the subject of her dreams. She drives to a remote house in the forest and meets a man claiming to be a serial killer. Unable to resist the chance to create a truly shocking piece of art, she agrees to spend the day with him. However, as the day goes on, she discovers she may have dug herself into a hole from which she can’t escape.
Creep 2

Medical researcher Frank, his fiancee Zoe and their team have achieved the impossible: they have found a way to revive the dead. After a successful, but unsanctioned, experiment on a lifeless animal, they are ready to make their work public. However, when their dean learns what they've done, he shuts them down. Zoe is killed during an attempt to recreate the experiment, leading Frank to test the process on her. Zoe is revived -- but something evil is within her.
The Lazarus Effect

Looking for work, Aaron comes across a cryptic online ad: “$1,000 for the day. Filming service. Discretion is appreciated.” Low on cash and full of naiveté, he decides to go for it. He drives to a cabin in a remote mountain town where he meets Josef, his cinematic subject for the day. Josef is sincere and the project seems heartfelt, so Aaron begins to film. But as the day goes on, it becomes clear that Josef is not who he says, and his intentions are not at all pure.
Creep

The third installment in the "Creep" franchise.