Homage to Cathy today, the no-nosed wonder twice as irked as usual — ACK ACK indeed. (Cathy and Voldemort both having no nose ... things that make you go hmm!)

Today is a perfect example where a revealer — some word or phrase explicitly explaining the theme — would have been fantastic. The puzzle works as is, since the themers follow a clear pattern that's not hard to spot. There wasn't a sharp a-ha moment, though, more a slow realization that each themer has two instances of ACK.
What could have been a good revealer? How about ACK itself, clued to Cathy's quaint cry? That's getting there, but it doesn't explain why there would be two ACKs.
ACK ACK (clued to the gun) would have been better, opening the eyes of even the greenest solvers. It's not a great crossword entry in itself, but it would have been a spot-on explanatory phrase.
Speaking of green solvers, this isn't the most welcoming early-week solving experience. Too many names (especially tough ones) can make a crossword feel like a trivia contest — IDINA, REX, ELTON, ANN, AUDI, ALEXIS, ROKU, AGRA, ANI, DYAN, SARTRE, GAYLE, NASHUA, OTIS. There's no hard and fast threshold for how many names is too many, but this crossed well into dangerous territory.
There weren't any glaring grid skeleton problems — it's a fine layout — but further iteration would have helped smooth out some of the inelegancies. Aside from the slew of not-everyday names, something like NES / ATA / SCI atop each other should trigger a revision.
Overall though, I did enjoy the bonuses — DEAL ME IN, NEW CAR, SABOTAGE are great — and it was fun to see so many *ACK *ACK phrases. You can use our Finder with the search string *ack*ack* to get lots of others, like HACKY SACK, WACKY TOBACKY, QUARTERBACK SACK.