4K restoration from the last surviving 35mm print by Le Chat Qui Fume

4K (2160p) Ultra HD Blu-ray presentation in Dolby Vision (HDR10 compatible)

Original lossless Esperanto mono audio

Optional English subtitles

Optional Esperanto subtitles for the deaf and hard-of-hearing

New audio commentary by writer and genre historian David J. Schow, author of The Outer Limits: The Official Companion

Archive audio commentary by star William Shatner

Archive audio commentary by producer Anthony Taylor, cinematographer Conrad L. Hall and camera operator William Fraker

Alternate 1.37:1 presentation of the film (1080p only)

Words and Worlds: Incubus and Esperanto in Cinema, a newly filmed interview with genre historian Stephen Bissette

Internacia Lingvo: A History of Esperanto, a newly filmed interview with Esther Schor, author of Bridge of Words: Esperanto and the Dream of a Universal Language

An Interview with the Makers of Incubus, an archive interview by Schow with Taylor, Hall and Fraker

Video trailer

Reversible sleeve featuring newly commissioned artwork by Richard Wells

Illustrated collector's booklet featuring new writing on the film by Frank Collins and Jason Kruppa