_**Corman’s Halloween-ish fairy tale of the Middle Ages in B&W**_ A psychologist (Val Dufour) comes back from Tibet and mesmerizes a streetwalker (Pamela Duncan) to go back to her former self in medieval times wherein she’s ready to be executed on the charge of witchcraft. Allison Hayes plays an evil witch, Richard Garland a knight, Mel Welles a gravedigger and Dorothy Neumann an ugly but good witch. Despite the title, "The Undead" (1957) has nothing to do with vampires. It was Roger Corman’s eleventh movie in a couple years (or twelfth if you count one flick he was uncredited for).…