Before I figured out the theme as a whole, I came across 20A: Best Picture between "The Last Emperor" and "Driving Miss Daisy", and I thought to myself, that must have been right around Rain Man, right? But it didn't fit, so I moved on. I did briefly wonder whether there would be a rebus.
Later on I noticed the presence of several "man" triplets throughout the puzzle. Somehow the theme eluded me even then. I had a strange time staring at 53A: Central American capital, and wondering what on Earth was going on when I could think of no city that started with Ag__.
So, really, a pretty darn clever theme, once revealed by CUTOUTTHE/MIDDLEMAN. The missing "man" from three answers is in between two other "man" in other clues, thus giving us RAIN[MAN], THEICE[MAN]COMETH, and [MAN]AGUA. I love it!
It was unfortunate to start with 1A: Maria's "those" (ESAS), which I think I may have complained about in the past. And there are 24 3-letter answers, which will stretch the ability of any puzzle crafter to come up with excellent fill. Despite that, there was some good cluing, including 6D: Queen's pawn? (ANT) and 43: Span of attention? (ERA). I still don't get 24D: Chapter seven? (ETA). I get that eta is the seventh Greek letter, but why chapter? Anybody explain for me?
Other things I liked: 32A: Offer? (HITMAN). That's pretty darn funny. SACKLUNCH is a nice non-theme entry. EMAILLIST is okay. GHERKIN and LUNATIC are a couple of great longer down clues. Kind of weird to have MODELA cross SCLASS. We also get Columbus represented twice in PINTA and MDII (Year of his last voyage).
And what's with the obsession with the movie Rio recently? I didn't even see it.
In keeping with the theme of the week in pictures: