^
^^That's him...on CHiPs, Robert Pine was Ponch and John's immediate superior - Sergeant Getraer. I was an adolescent boy during 'CHiPs' network run, so of course I never missed an episode. I liked Pine's character quite a bit (probably more than Erik Estrada's character).
...and you say he was in 'Lost in Space' as well...cool.
As mentioned by Sharr Khan above, Robert Pine was also in 'Enterprise' ('Fusion') and Voyager ('The Chute'). Taking a quick look at his L-O-N-G resume on IMDB, I see he's done some other sci-fi also -- an episode of 'Quantum Leap' and the movie 'Independence Day'.
Maybe Robert Pine wasn't a "master thespian", but his acting was good enough to keep him employed through the 160+ roles listed on IMDb. Here's hoping his son can be at least as good (and hopefully better).