I googled his image, and found that he was also Commodore Mathew Decker in the classic Star Trek ep "The Doomsday Machine."
One of the few actors who actually chewed MORE scenery than Shatner. They, like,
fed each other pieces of the set in every scene like a bride & groom at the reception. Freaking. Awesome.
Decker: I... I beamed the crew off the ship... down to the planet...
Kirk: (stunned) The planet's. Gone. Matt.
Decker: DON'T YOU THINK I KNOW THAT!!!!
So cool. His death scene is great, too (oh, c'mon. I didn't ruin it. You'd have figured it out). I also liked that Decker looked like he'd been drinking all weekend.