It isn't a big deal, but I always wonder about more than half the photos on Jerry Parks' wall in Requiem For A Falling Star." W.C. Fields is easy, and I think the one that Columbo is especially curious about is Marilyn Monroe (not just because she's singled out that way, but because it looks like her).
And even though I've never been too familiar with her, I think the blonde actress in the close-up photo is Carole Lombard.
And I could be far off, but the one just below her looks a little like Anne Baxter herself.
Does anyone know who is who in those photos?