I vaguely remember Nichols saying that she improvised the line "If I have to say 'Hailing frequencies open' one more time, I'll scream. Why don't you tell me I'm an attractive young lady?" during a shoot. They likely built the scene around that.
If I had to guess on which episode she did this on, I'd say "The Corbomite Maneuver," the very first episode Nichols shot and one in which she has literally no other lines to say. Amazingly, Star Trek Script Search shows that Nichols said the phrase "hailing frequencies open" only seven times in all of TOS and the original cast movies, and of those, FIVE of them were in "The Corbomite Maneuver!"
So yeah, she probably got sick of saying that line her first week on the set.
If I had to guess on which episode she did this on, I'd say "The Corbomite Maneuver," the very first episode Nichols shot and one in which she has literally no other lines to say. Amazingly, Star Trek Script Search shows that Nichols said the phrase "hailing frequencies open" only seven times in all of TOS and the original cast movies, and of those, FIVE of them were in "The Corbomite Maneuver!"
So yeah, she probably got sick of saying that line her first week on the set.
