Tom Mason, Ed Woods's wife's chiropractor, in Plan 9 from Outer Space. Mason played the role with his cape covering the lower half of his face.

In I Wake Up Screaming, Victor Mature plays a character named Frankie Christopher. But in one scene he tells Betty Grable that's not his real name. He changed it because his real name was too hard to spell. What was his real name?

Ha! It's Botticelli.

In what movie is Vincent D'Onofrio's character murdered in the very first scene?

Just saw that...Brooklyn's Finest.

The movie title RED is an acronym for what?

Retired, Extremely Dangerous.

What do these actors have in common: Donald Sutherland, Jennifer Tilley, Margot Kidder, Jeremy Irons, Nicolas Cage, Olivia de Havilland, Bette Davis, Boris Karloff, and James Spader?

Has this been languishing all this time? They have all played twins...

and in the same vain, what future coffee spokesperson appeared as a pair of bewitching sisters?

Do you mean Margaret Hamilton? She doesn't quite fit the question, so I'll wait until I hear back.

Yep...she played both wicked witches...and hawked Maxwell House many years later:
http://www.youtube.com/watch?v=DYaNqtQMlXY

Barbara?

Okay, I forgot I was in the movie topic. The witches were sisters in the movie, but not in the book.

What movie featured three actors who had all played Elizabeth I?

It's easy to find Blanchett and Dench....but the third one is a puzzler...