I've always enjoyed the early 1st season and Grace Lee Whitney's contribution. The years after Trek were the most turbulent period of her life. Not too long ago I saw some rare pictures of her visiting the set and lunching with Nimoy and Shatner (who were in costume) and to me it looked like an enjoyable reunion. The pics hinted that this occurred somewhere midway through S2.
Clearly Grace was a welcomed visitor despite having been let go, and her IMDB profile hints that she stayed active despite her personal life and eventual decline.
Can anybody elaborate on that visit?