Audio: The audio portion was fine however, as it was merely a 2 channel stereo production, there was no use of surrounds or sub.

Video: The widescreen transfer of the film shows it's age with flecks & occasional blemishes but, it's generally well done. The disc does carry both the pan & scan as well as the widescreen versions.

Extras: There is one trailer

Overall: This is a 1970's Sci/Fi thriller that hasn't lost it's edge. It's a well done film that will either impress you with it'execution or confirm your worst nightmares about hospitals & doctors in general. I once saw this film on PBS in Philadelphia many years ago & remember really enjoying it. Now years later seeing it again on DVD, it's just as intense & just as gripping. IMHO, it's worth being a part of any Sci/Fi collection.