Insidious Movies: 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 original audiences experienced them.
This is the recommended viewing experience for first-time viewers, because 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.
There are 2 other watch orders available - see the links up above.
Insidious / Insidious: Chapter 2 / Insidious: Chapter 3 / Insidious: The Last Key - SetGet the collectionAffiliate link - no extra cost

Insidious
When a family's young son falls into a mysterious coma, they discover their home is haunted by malevolent spirits seeking to possess him. They must venture into a supernatural realm called "The Further" to save their child's soul.
Affiliate link - no extra cost

Insidious: Chapter 2
The Lambert family continues to battle supernatural forces as they investigate a dark childhood secret that keeps them tethered to the dangerous spirit world.
Affiliate link - no extra cost

Insidious: Chapter 3
A teenage girl and her family face supernatural terror as they encounter the dark mysteries of 'The Further,' a sinister otherworldly realm.
Affiliate link - no extra cost

Insidious: The Last Key
Parapsychologist Elise Rainier investigates a haunting in Five Keys, New Mexico, only to discover the case involves her own childhood home and dark family secrets.
Affiliate link - no extra cost

Insidious: The Red Door
Josh Lambert and his college-aged son Dalton must venture deeper into The Further than ever before to confront their family's dark past and face new supernatural terrors lurking behind a mysterious red door.
Affiliate link - no extra cost
Other Film Series
Chernobyl
Feature films exploring the 1986 Chernobyl nuclear disaster and its lasting impact on the exclusion zone.
David Lynch
Visionary surrealist filmmaker known for his exploration of dream logic, suburban darkness, and the mysteries lurking beneath everyday American life.
The Conjuring Universe
Supernatural horror franchise following paranormal investigators Ed and Lorraine Warren and their haunted cases.
The Howling
A werewolf horror franchise that begins with Joe Dante's cult classic but quickly devolves into a collection of largely standalone sequels with minimal continuity.
Underworld
A gothic action series following the centuries-old war between vampires and Lycans (werewolves), centered on vampire Death Dealer Selene.
V/H/S
A found footage horror anthology franchise where each film presents multiple terrifying short stories discovered on mysterious VHS tapes.