As I recall, Uhura wasn't often off the bridge. And aside from TAS, the only other officer we saw at that station during the series was Palmer. And Chekov, in one movie. (Would've been nice to see a guy manning communications just once during the series -- I think Uhura told a male colleague to "take over for me" in Mirror, Mirror
George Takei was missing from some season two eps because he was filming The Green Berets
with John Wayne. What was Nichelle Nichols doing when she was missing? Was it simply that her contract was only for a specific number of eps per season?