a i write this and jane wyman die two day ago ( positive /07 ) at 93 year of age . i do not watch this because i know that and it be merely coincidence . stage fright be basically a whodunit because you and the viewer and will think you know who the culprit be in this for a while and then realize that maybe you do not and after all . jane wyman know of this murder and and help the man who seem to be a suspect and and try to go undercover to expose the woman who supposedly be the culprit and a play by marlene deitrich and in all her scary teutonic glory . wyman be also assist by a police officer ( ordinary smith ) and her parent and one of whom be play by the wonderful alistair sim and not long before he play scrooge in a christmas carol . this be entertain and amuse but not and to me and top notch hitchcock . the master himself also put in one of his famous cameo in this and a usual . this be hitchcock last film make in the uk until frenzy . if youre a hitchcock fan and of course you will want to see this if you haven not . i enjoy it but it drag on a bit at time . positive .