Carl Nash

Carl Nash runs a small business that puts him in the orbit of a case Bosch is working, an ordinary-seeming tradesman who answers questions with the practiced patience of someone used to cops asking them. He is polite, unhurried, and gives away nothing more than he has to.

Brent Sexton plays him with a working-class plainness that never tips into obvious menace, which is exactly the point — the show trusts you to notice the small hesitations under the courtesy. It's a performance built on restraint, letting unease accumulate in silences rather than dialogue.