Guest Stars:

Jan Shutan              Lt. Mira Romaine, assigned to supervise all newly desinged equipment for Memory Alpha
John Winston            Lt. Kyle, transporter tech
Libby Erwin             Rindonian (?)

Crew appearences:
Kirk, Spock, McCoy            Landing party: Kirk, Spock, McCy Scott

Scott (promentant role)
Chekov (eyes were affected)
Sulu (speech was affected)
Uhura (hands were affected)
Mr. Lemley- engeneering on the bridge
Nurse Chapel

Lieutenant Mira Romaine, who Scotty has fallen in love with, is possessed by the lights of Zetar, a cloud-like being that is actually a group of non-corporeal life of a now-dead race. Enjoying physical existence again, they decide to keep their human host at the expense of her own life.

Memory Alpha: planetoid set up by the Federation to serve as the central library containing the total cultural history and scientific knowledge of all Federation members.

Occupant races on Memory Alpha: a tellarite, an andorian, unidentified, human

Universal Translator used.

Standard Steinman Analysis: some sort of psychological test

hyperencephalogram, BCP: a medical test.

Quotes:
" When a man of Scotty's years falls in love, the loneliness of his life is suddenly revealed to him." Kirk
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"I didn't know Mr. Scott would go for the brainy type." Chekov.
"I don't think he's noticed she has a brain." Sulu.
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She's dead." McCoy.
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"I trust all of you implicitly" : Mira
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"Well. this is an enterprise first. Dr. McCoy, Mr. Spock, Mr. Scott find themselves in complete agreement. Can I stand the strain?" Kirk.