What was this show?

A small group of people dole out extrajudicial punishment to evildoers. A gimmick is that one of them is a judge who, when the robe comes off, is a badass motorcycle rider. It, iirc, was pretty bad.

Dark Justice.

There was Hardcastle and McCormick. Hardcastle was a judge who retired and decided to go after people he thought were guilty but had escaped on legal technicalities.

But Brian Keith played the judge and I don’t think he rode a motorcycle.

This sounds like a movie called The Star Chamber.

Thanks TOWP- I think that’s it.