Mark Lenard always brought gravitas to any Trek episode or movie he appeared in. Great actor.
My one pseudo Mark Lenard story: When I was in high school, my local radio station in NYC, WNEW-FM, had this daily call-in contest called the "Morning Mind Exercise". Basically they would ask a trivia question, and the first correct caller won a prize. Well, one morning before school, celebrating the release of ST:IV, the question was:
"What actor played a Romulan, a Klingon, and Spock's father?"
I called in, and, amazingly won! I was on the air, saying, "Mark Lenard, of course!"
So with that, I won year's supply of crappy Krauser's ice cream (they sent me 52 coupons for half gallon tubs). I recall having a party and getting about 10 of them