Crossroads

I don't think that's redundant. Think of how many mysteries in which the culprit/villain/murderer is known from the beginning of the film (for instance, "Sleuth"). Those are 'cat-and-mouse' stories, and it's a matter of time before the perp is found out.

"Crossroads", however, remains mysterious until the very end, and the mystery deepens as the film unfolds. William Powell, at his urbane best, is the amnesia victim who may or may not have been a criminal before his accident. Hedy LaMarr is his devoted wife and is gorgeous but with little else to do. Basil Rathbone is in one of his patented Loathsome Villain roles and gives the picture the rating I gave it.

The picture is extremely well written and holds the interest throughout its 84 minutes, which in this case fly by - no chance to check your watch in this one. Don't know if it was an 'A' or a 'B' at the time, but "Crossroads" is one of the best unheralded movies ever made.