Not sure which episode, I know it's from the original Star Trek. It's a Thalosian and he is played by a woman! Found that out from another flipper. Have no fear, no shame in being a nerd. I'm not the biggest Star trek fan, I prefer my sci-fi with a grittier, more realistic/possible/probable feel than their franchise (Battlestar, Expanse, along those lines, was a huge fan of Battletech/MechWarrior back in the '90s and ). The latest installment was pretty good tho.