2:00 a.m. Eastern-- "Murder, She Said". Margaret Rutherford, Arthur Kennedy, Muriel Pavlow, Stringer Davis, James Robertson Justice, Joan Hickson

I have not seen either of these, but I like Agatha Christie, and LOVE Margaret Rutherford in anything, and here she is, for many, the definitive "Miss Marple". Miss Marple sees a young woman being strangled on a passing train, and must worm her way onto the estate where she thinks the body has been hidden.
Bonus-- This film contains the marvelous Joan Hickson, who would later star herself in an excellent BBC series of "Miss Marple".
Followed by:
3:30 a.m. Eastern-- "Murder Most Foul". Margaret Rutherford, Ron Moody, Megs Jenkins, Francesca Annis, Stringer Davis

Murder mystery with a theatrical backdrop. Stringer Davis appears again-- he was Margaret Rutherford's hubby in real life.
This is a very promising double feature that I plan to tape and savor on a rainy afternoon...