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Star Trek: S3 E18
The Lights of Zetar
Strange incorporeal aliens threaten the Memory Alpha station and the Enterprise.
S3 - E1Spock's Brain Sep. 20, 1968
S3 - E2The Enterprise Incident Sep. 27, 1968
S3 - E3The Paradise Syndrome Oct. 04, 1968
S3 - E4And the Children Shall Lead Oct. 11, 1968
S3 - E5Is There in Truth No Beauty? Oct. 18, 1968
S3 - E6Spectre of the Gun Oct. 25, 1968
S3 - E7Day of the Dove Nov. 01, 1968
S3 - E8For the World Is Hollow and I Have Touched the Sky Nov. 08, 1968
S3 - E9The Tholian Web Nov. 15, 1968
S3 - E10Plato's Stepchildren Nov. 22, 1968
S3 - E11Wink of an Eye Nov. 29, 1968
S3 - E12The Empath Dec. 06, 1968
S3 - E13Elaan of Troyius Dec. 20, 1968
S3 - E14Whom Gods Destroy Jan. 03, 1969
S3 - E15Let That Be Your Last Battlefield Jan. 10, 1969
S3 - E16The Mark of Gideon Jan. 17, 1969
S3 - E17That Which Survives Jan. 24, 1969
S3 - E18The Lights of Zetar Jan. 31, 1969
S3 - E19Requiem for Methuselah Feb. 14, 1969
S3 - E20The Way to Eden Feb. 21, 1969
S3 - E21The Cloud Minders Feb. 28, 1969
S3 - E22The Savage Curtain Mar. 07, 1969
S3 - E23All Our Yesterdays Mar. 14, 1969
S3 - E24Turnabout Intruder Jun. 03, 1969