Just watching The Corbomite Maneuver on Netflix, from a script point of view it is considered one of the best TOS episodes, how to deal with the unknown, watching a Starfleet officer having a breakdown and seeing how Kirk gets out of a seemingly no win situation. However from this viewer's point of view Nichelle Nichols seems bored, how she looks and how she performs her lines. I wonder if this is when she decided she wanted to leave?