This is one beauty of a head-scratcher. It is, literally, 3 movies in one. Al Adamson made the tight-yet-pointless heist film ECHO OF TERROR (a/k/a TWO TICKETS TO TERROR) in 1964, only to see it chopped up and intermixed with new footage several years later (starring John Carradine as an ethical but mad scientist) and retitled MAN WITH THE SYNTHETIC BRAIN, and sold as a horror cheapie to television. Not to be outdone, he and producer Sam Sherman further complicated matters by adding a third plot strand to the mix (something to do with killer zombies and yet another mad scientist, not to mention a rather sickly looking Tommy Kirk), and another new title, BLOOD OF GHASTLY HORROR. In order for the final incarnation to make sense, there are flashbacks-within-flashbacks all over the place. There was yet another version, PSYCHO-A-G-GO, which had musical numbers spliced amongst the madness!
Amazingly, it's quite an enjoyable viewing experience following the severely warped logic of the narrative, which only gets more confusing with each viewing.
Topping it off is some of the best commentary I've yet heard on any dvd, provided by Sam Sherman, who promises to some day restore the integrity of Adamson's ECHO OF TERROR to its original glory (well, one can hope).
As with Ed Wood, it's hard not to admire director Al Adamson's earnestness, and Vilmos Szigmond's cinematography (on the ECHO OF TERROR portions), despite the faded print used for the dvd, shows a precocious eye for composition. A most unusual recommendation!