Insidious is an American horror franchise created by Leigh Whannell and James Wan that has been produced by Blumhouse in association with Sony’s Stage 6 Films since 2010.

The first two films center on a couple who, after their son mysteriously enters a comatose state and becomes a vessel for ghosts in an astral plane, are continuously haunted by demons from a forbidden realm known as the Further until they take from the family what they want most: life.

The third film, a prequel, focuses on the same psychic who helped the family; this time she comes to the aid of a young girl who calls out to the dead.

Insidious was directed by James Wan, written by Leigh Whannell, and starred Patrick Wilson, Rose Byrne and Barbara Hershey.

The film stars Wilson and Byrne reprising their roles as Josh and Renai Lambert, a husband and wife who seek to uncover the secret that has left them dangerously connected to the spirit world.

Lin Shaye reprises her role as Elise Rainier alongside Spencer Locke, Caitlin Gerard, Bruce Davison.

The plot centers on the Rainier haunting, after a young Elise opened a forbidden red door and unwillingly allowed an extremely dangerous spirit known as the Key Demon to enter the human world.

Wilson, Ty Simpkins, Andrew Astor, Rose Byrne, Whannell, Angus Sampson, and Lin Shaye all reprise their roles from the first two films with Sinclair Daniel joining the cast.

[10] In January 2018, during a press interview for The Last Key, Jason Blum stated that a crossover film between Insidious and Sinister had previously been in development.