Yes, that steaming pile of elephant dung was from The Savage Curtain in which Lincoln had horrible overly tanned makeup and was entirely too short. Then there's Kahless, the founder of the Klingon Empire looking like some sort of puny sawed off Mongolian who reappeared in STTNG as the now classic butt head. There was the hysterical episode where they flash back to The Trouble With Tribbles in which Worf explains it as "a sudden genetic mutation" and turns away with this "oh go away" look on his face. There are all sorts of strange quirks all through Star Trek and its spinoffs like the GNDN conduits in the Jefferies tubes. Set designer John Jefferies explained they go nowhere do nothing. Frankly only one sci-fi TV show has Trek beat for getting all tangled up in itself is Doctor Who but only because it has had more time to do so beginning in 1963.