...This is one my favorite old sci-fi movies. I saw it first on Saturday Night at the Movies (it may have been the *first* movie shown there, but I was young then and forgetful now), at the beginning of the eventual flood of cinema to the small screen in the early 60's. Good acting, very good effects for 1951, good script, lecturing held in check, and the coolest music to date, composed by Bernard Herrmann. Love that theremin...