https://www.thewrap.com/james-olson-actor-70s-tv-hits-dead-91/
Guess he can't reprise his role as Kirby in Commando 2 now
RIP
The only thing I vividly remember him in is The Andromeda Strain, which I've seen about 5 times. I'm sure I've seen him in other productions but it's The Andromeda Strain that sticks with me. RIP Dr. Mark Hall!
he was a prolific character actor
RIP. Had no idea he was that old.