I still don't know them all and when .... & what they looked like ...

Capt. Barney Miller

First group:
Sgt. Stan Wojciehowicz - big, dumb guy
Sgt. Phil Fish - old, sick guy
Sgt. Ron Harris - black guy
Sgt. Nick Yemana - Japanese guy
Sgt. Chano Amengual - Puerto Rican guy

Inspector Frank Luger - old guy who visits

Det. Janice Wentworth (a few episodes) - dark, frizzy hair

Replacements:
Sgt. Arthur Dietrich (replaced Fish) - glasses
Det. Carl Levitt (replaced Nick) - short

Short-timers:
Det. Roz Licori (just a couple episodes) - looks like a suburban housewife
Det. Battista (just a couple episodes) - Puerto Rican, very short
Det. Dorsey (just a couple episodes) - young guy with big hair

I think that's all the significant ones. There's some one-episode people in the early going, including a black guy named Wilson who does some undercover stuff.

love your descriptions lol

And a real short time (one episode): Det. Paul Gardeno - initially grubby, long haired and bearded, but later neat and clean.

Sgt. Arthur Dietrich (replaced Fish) - glasses


and smart guy