^It was a second-season episode, "The Deadly Goddess Affair."
In fact, the three episodes on the DVD I just finished include two Organians, both playing scientists working for THRUSH: Peter Brocco in "The Dippy Blonde Affair" and John Abbott in "The Birds and the Bees Affair." Unfortunately, David Hillary Hughes (Trefayne) won't be joining them, since he only has two non-Trek credits on his filmography.
Christopher, do you recommend buying the U.N.C.L.E. complete series set? I started watching it during its first season (my favorite due to theme arrangement), was buying the Aurora and AMT model kits, getting the monthly short story magazine, etc. I know the third season was crap, and they almost pulled it out of the fire in the fourth, but it was too late.
All I have now are a few episodes on VHS, including The Project Strigas Affair.