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