In the early 1980s, Dario Argento (Deep Red, The Bird with the Crystal Plumage), Italy's legendary master of horror, returned to the giallo thriller genre in which he originally made his name for his most blood-drenched and self-reflexive offering to date: Tenebrae.

A razor-wielding psychopath is stalking the thriller writer Peter Neal (Anthony Franciosa, Death Wish II), in Rome to promote his latest work, Tenebrae. But the author isn't the obsessive killer's only target: the beautiful women who surround him are doomed as, one by one, they fall victim to the murderer's slashing blade.

Co-starring Daria Nicolodi (Phenomena) and John Saxon (A Nightmare on Elm Street) and featuring stark, modernist photography by Luciano Tovoli (Suspiria), this one-time Video Nasty updates the classic giallo blueprint for a new decade - now fully restored in 4K alongside a plethora of extras old and new and including, for the first time ever, the alternate US cut, Unsane.

4K: Region Free

Blu-Ray: Region B

• New 4K restoration from the original camera negative by Arrow Films
• Limited edition packaging with reversible sleeve featuring original and newly commissioned artwork by Obviously Creative
• Illustrated collector's booklet featuring writing on the film by filmmaker Peter Strickland and Argento biographer Alan Jones, an interview with cinematographer Luciano Tovoli and a new, in-depth analysis of the film by critic Ashley Lane
• Fold-out double-sided poster featuring original and newly commissioned artwork by Obviously Creative
• Six double-sided, postcard-sized lobby card reproduction artcards

Disc 1 (4K Ultra HD Blu-ray) - Original Version

• 4K (2160p) UHD Blu-ray presentation in Dolby Vision (HDR10 compatible)
• Original Italian and English front and end titles and insert shots
• Restored original lossless mono Italian and English soundtracks
• English subtitles for the Italian soundtrack
• Optional English subtitles for the deaf and hard of hearing for the English soundtrack
• Audio commentary by authors and critics Alan Jones and Kim Newman
• Audio commentary by Argento expert Thomas Rostock
• Audio commentary by Maitland McDonagh, author of Broken Mirrors/Broken Minds: The Dark Dreams of Dario Argento
• Yellow Fever: The Rise and Fall of the Giallo, a feature-length documentary charting the genre from its beginnings to its influence on the modern slasher film, featuring interviews with Dario Argento, Umberto Lenzi, Luigi Cozzi and more
• Being the Villain, a newly edited archival interview with actor John Steiner
• Out of the Shadows, an archival interview with Maitland McDonagh
• Voices of the Unsane, an archival featurette containing interviews with writer/director Dario Argento, actresses Daria Nicolodi and Eva Robins, cinematographer Luciano Tovoli, composer Claudio Simonetti and assistant director Lamberto Bava
• Screaming Queen, an archival interview with Daria Nicolodi
• The Unsane World of Tenebrae, an archival interview with Dario Argento
• A Composition for Carnage, an archival interview with Claudio Simonetti
• Archival introduction by Daria Nicolodi
• International theatrical trailer
• Japanese "Shadow" theatrical trailer
• Alternate opening credits sequence
• "Unsane" end credits sequence
• Image galleries

Disc 2 (4K Ultra HD Blu-ray) - "Unsane" Version - Limited Edition Exclusive

• 4K (2160p) UHD Blu-ray presentation in Dolby Vision (HDR10 compatible)
• The re-edited 90-minute US version, specially recreated for this release from the new 4K restoration of the full-length 101-minute version, exclusive to UHD
• Two audio options: a recreation of the original theatrical experience, complete with jump cuts and sudden audio shifts, and a new, more seamless edit created for this release, both in restored lossless English mono
• Optional English subtitles for the deaf and hard of hearing
• Original "Take Me Tonight" stereo EP recording, performed by Kim Wilde

Disc 3 (Blu-ray) - Original Version

• High Definition Blu-ray (1080p) presentation
• All the same content as Disc 1