Insidious - Watch Order: Release Order
The Insidious franchise is a supernatural horror series that explores the terrifying realm known as The Further, where malevolent spirits prey on the living. This complete release order follows both the Lambert family saga and the backstory of psychic investigator Elise Rainier as originally intended by the filmmakers.
This is the recommended viewing experience for first-time viewers, as the later prequels contain references and character developments that assume knowledge from the original films. The order preserves the intended scares, reveals, and emotional impact while showing how the franchise evolved from the Lambert family's supernatural struggles to exploring Elise's earlier cases and personal history.

Insidious
A family discovers that dark spirits have invaded their home after their son inexplicably falls into an endless sleep. When they reach out to a professional for help, they learn things are a lot more personal than they thought.


Insidious: The Last Key
Parapsychologist Elise Rainier and her team travel to Five Keys, NM, to investigate a man’s claim of a haunting. Terror soon strikes when Rainier realizes that the house he lives in was her family’s old home.

Insidious: The Red Door
To put their demons to rest once and for all, Josh Lambert and a college-aged Dalton Lambert must go deeper into The Further than ever before, facing their family's dark past and a host of new and more horrifying terrors that lurk behind the red door.
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