You're not likely to forget Ann Savage as the drifter who comes into his life--fierce (hellish?) doesn't quite cover it.
Savage recently died. There's a fine appreciation of her here.
The second film stars John Carradine as a puppeteer-artist-serial killer. He's brilliant.
UPDATE (1/31): If you were at the screening last night, and one of the MANY who left during BLUEBEARD because the dialogue was often unintelligible on the crappy DVD that was used, I wish I could help you out. But the best DVD version of this atmospheric gem is out of print.