I think he was an Izarian -- and not human, but then again nobody asked me...
If they made that episode now, I think he'd have some kind of bumps on his head or weird ears or some such...and then we'd know for sure he was an alien. But, back in the day with budget's being tight and all...he just looked human like most of the aliens on TOS...

If they made that episode now, I think he'd have some kind of bumps on his head or weird ears or some such...and then we'd know for sure he was an alien. But, back in the day with budget's being tight and all...he just looked human like most of the aliens on TOS...