"Rhapsody in Blue" - Sickbay sees an influx of sciences staff reporting trouble sleeping, disturbing dreams, etc. Christine mentions it to McCoy, but he suggests it may have something to do with crew evaluations coming up, staff turnover, heavy workloads, etc - just the usual stuff, but he says he'll make a note of it and recommend shift changes, leave for the staff, that sort of thing. She's satisfied until some of the women begin reporting similar images in their dreams - a strange voice and presence speaking to them. Concerned, she runs a detailed analysis on their life signs, biochem readings, etc, on her own time, and finds certain similarities between them. Things become even more crazy when one of the women who are in sickbay for a rest suffers a breakdown and dies. Everyone else is now convinced that something's up, but don't know where to begin looking. Christine decides to recreate the similarities between the women in herself, in the hopes that whatever is affecting them will find her. She becomes locked in a dreamscape, communicating with the being who is searching the sciences crew for a compatible mind-mate. Can Spock and McCoy bring her out of it, before she becomes joined with the being to save the crew further trouble?
Next episode: "Of Mars and Men"
Next episode: "Of Mars and Men"