1960s (Columbia)

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1966

(TOS: "Visit to a Strange Planet Revisited" (Studio sections): The New Voyages)
23 February: (TOS: "From History's Shadow", Chapter 26)
29 March (Reference Stardate -1/6803.29): During an historical research mission in 1968, the U.S.S. Enterprise NCC-1701, having traveled back in time from 2267, encounters Gary Seven, a.k.a. Supervisor 194, a human with advanced technology who appears to be attempting to alter Earth's history, while on an assignment to prevent humanity from destroying itself in a nuclear war. (TOS 55: "Assignment: Earth"; TOS: "From History's Shadow", Chapter 31)
29-30 March: Chapters 28-30 (TOS: "From History's Shadow")
April 4: "Isolation Ward 4" (Final Entry) (Strange New Worlds IV) (DS9)
22 April: Chapter 32 (TOS: "From History's Shadow")
(AE 1: "Brighter Than a Thousand Suns"

10 July: (Reference Stardate -1/6701.26) Captain John Christopher, a United States Air Force interceptor pilot, reports a UFO, but it soon disappears from view. The UFO was, in fact, the U.S.S. Enterprise NCC-1701, which had accidentally traveled back in time from 2266. (TOS 21: "Tomorrow is Yesterday"; FASA 2214: Star Trek III: The Search for Spock Sourcebook); Chapters 34-36 (TOS: "From History's Shadow"); (AE 2: "Yesterday, Today and Tomorrow"); "The Aliens are Coming!" (Strange New Worlds III) (TOS)
July 19: Chapters 1, 22 (TOS #84: "Assignment: Eternity")
July 20: Neil Armstrong becomes the first Human to step foot on Earth's moon. (FASA-2214: Star Trek III: The Search for Spock Sourcebook; ENT 01-02: "Broken Bow"; TOS 00: "The Cage" (Remastered Edition))

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