It was the episode "Corbomite Maneuver" . He played Balok, an Alien that was boyish with an adult voice. When we were kids, we used to mock his over the top laugh and lust for the drink...Tronya. Fast forward to when I was fresh out of the USAF, about 34 years ago, we'd be in a Sports Bar, watching our Gators or just there to get drunk, raise our beers and YELL .... It's TRONYA!!!! AHHHHHHHHHHHH HA HA HA.
O....M...G.. Just a year or two after my Brother passed, they had a William Shatner Roast and Clint Howard returned to do his Balok routine. It was CLASSIC!! When I saw it, I could hear my Brother cracking up!