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Beam Me Up
Tomorrow Is Yesterday

Star Trek: The Original Series

S1 E19 - Tomorrow Is Yesterday
Realm of Fear

Star Trek: The Next Generation

S6 E2 - Realm of Fear
The Doomsday Machine

Star Trek: The Original Series

S2 E6 - The Doomsday Machine
Mirror, Mirror

Star Trek: The Original Series

S2 E4 - Mirror, Mirror
The Enemy Within

Star Trek: The Original Series

S1 E5 - The Enemy Within