I know he's not normal, but he seemed even more not-normal than usual. Even the mister, who doesn't "watch" the show but was in the room, was all, "Dude, what's with the Data impersonator?"

I did adore Zack's "logic" over letting everyone think he killed a guy, though. Classic Zack, and much better logic than his convoluted story for getting involved with the killer in the first place.