Well covered elsewhere, but for the sake of the record, Steve Landesberg. Yeah, I liked Dietrich better than any of the other guys (except maybe Nick Yemana).
Also: “Old Man” is dead at the age of 32.
If you haven’t seen Fast, Cheap & Out of Control, it’d make a fun night of viewing. It isn’t my favorite Errol Morris documentary, but it is one of the best naked mole rat/lion training/robotics/topiary documentaries there is.
And Amazon’s prices on the first season, second season, and third season of Barney Miller are strikingly reasonable.