For a cheaply made “B picture,” “My World Dies Screaming” is surprisingly effective, and most of the credit for the film’s success must surely go to Cathy O’Donnell in the lead. O’Donnell, who most viewers might remember from the 1946 classic “The Best Years of Our Lives” as well as for appearing in the cult item “They Live By Night” and the excellent film noir “Side Street” (both from 1949 and both costarring Farley Granger), is truly excellent here, lovely and appealing, and appearing in every single scene of the film. Gerald Mohr, playing Philip, gives a nicely ambiguous portrayal (many viewers will remember him from the following year’s “The Angry Red Planet”), and the film’s other three performers (Barry Bernard as Sheila’s shrink, John Qualen as the house’s uberstrange caretaker, and Bill Ching as Philip’s cousin) are all fine as well. Harold Daniels directs his picture competently, eliciting chills on a regular basis, although it must be said that the film seems a bit eerier in its first half. Still, the mystery of Sheila’s nightmares, and her familiarity with a house she’s never been in, is a fascinating one, and keeps the viewer involved throughout; to the film’s credit, the resolution of that mystery entails a surprisingly complex backstory that does manage to tie up every loose end. As to those subliminal messages, they ARE visible, although only a frame-by-frame viewing on your DVD player will reveal their contents. Basically, they consist of demon masks with the following captions: “Scream.” “Scream Bloody Murder.” “Prepare To Die.” And “Die Die Die.” (One message, very amusingly inserted by the DVD manufacturer, exhorts us to “Buy Rhino Videos Every Day”!) As I mentioned before, these flashes of…something become hokey after a while, and the film is good enough to stand on its own without them. It’s nothing great, surely, but is an engaging entertainment nevertheless. Now, if you’ll excuse me, I’d like to wrap up this little review and run down to the grocery store. For some strange reason, I’ve just developed a sudden urge to purchase popcorn, Goobers and Raisinets….