Extra Features:

• "The Making of 'Cuckoo'" (5:34, HD) features interviews with producers Markus Halberschmidt and Josh Rosenbaum, production designer Dario Mendez Acosta, costume designer Frauke Firl, and actors Marton Csokas, Hunter Schafer, Kalin Morrow, Mila Lieu, and Jessica Henwick. The interviewees are in salesperson mode, sharing their praise for writer/director Tilman Singer and his original vision for "Cuckoo," with Schafer noting his extraordinary knowledge of the material, making him an ideal collaborator. A few technical achievements are celebrated, pointing out the visual meaning of Gretchen's jacket, and praise for Schafer's performance is offered. There's nothing revelatory here, and it's far from a deep dive when it comes to the mysteries of the picture.
• "The 'Cuckoo' Video Diaries" (7:35, HD) spends a little time on the set of the movie, watching the cast hang out while the crew prepares upcoming shots. There's some decent fly-on-the-wall footage of the production in motion. Actress Hunter Schafer also provides semi- rambling interview time, celebrating her concentration with her first leading role, also sharing how bloody "Cuckoo" is. For added enjoyment, writer/director Tilman Singer makes sure to flip off the camera whenever he's featured.
• On-Set Interviews (HD) include actress Hunter Schafer (10:14), costume designer Frauke Firl (7:49), and production designer Dario Mendez Acosta (5:01, HD).
• Deleted Scenes (HD) include "Henry's Arrival" (2:52), "Beth & Alma" (1:08), "Gretchen in the Dark" (1:33), "Gretchen & Henry" (:46), "Alma & Bonomo's Technician" (:42), and "Henry's Dream" (2:05).
• And a Theatrical Teaser (:35, HD) and a Theatrical Trailer (2:25, HD) are included.