The tenth episode of H.G. Wells’ The Invisible Man, based on Wells’ story, airs on ITV; the series will be shown later in the U.S. on CBS. Lisa Daniely and Deborah Watling (Doctor Who) star.
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British broadcaster ABC airs the 60th episode of the spy-fi series The Avengers, starring Patrick Macnee and Honor Blackman.
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NBC airs the tenth episode of the military drama The Lieutenant, created and produced by future Star Trek creator Gene Roddenberry and starring Gary Lockwood (2001: a space odyssey) and Robert Vaughn (The Man From UNCLE). Ed Asner (Lou Grant) guest stars. 
The tenth episode of Irwin Allen’s adventure series Voyage To The Bottom Of The Sea airs on ABC, starring Richard Basehart and David Hedison. Carl Reindel guest stars.
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The Soviet Union launches Venera 3, its third attempt to send a spacecraft to Venus. Intended to land on the surface of what is still thought of as a near-twin of Earth, Venera 3’s landing capsule does indeed enter the Venusian atmosphere in March 1966, though the capsule loses contact with Earth and goes silent before ever hitting the surface of Venus. Venera 3 may be the first human-made object ever to arrive on another planet, but no telemetry exists to prove that it arrived in one piece.
British broadcaster ABC airs the 86th episode of the spy-fi series The Avengers, starring Patrick Macnee and Diana Rigg.
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The 39th episode of Irwin Allen’s science fiction series Lost In Space premieres on CBS, starring Guy Williams, June Lockhart, and Jonathan Harris.
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ABC broadcasts the tenth episode of the Filmation animated series Fantastic Voyage, based on the 1966 movie of the same name. Marvin Miller, Ted Knight, and Jane Webb lead the voice cast.
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The 222nd episode of Doctor Who airs on the BBC. Kevin Stoney guest stars as Tobias Vaughn, and Nicholas Courtney returns as the freshly-promoted Brigadier Lethbridge-Stewart, head of the newly created UNIT. This is the last Cybermen story until 1975.
This timeline entry leads to an entry covering this entire Doctor Who serial; there are plans to write new episodic entries in the future. You can support this effort!
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ABC airs the 35th episode of Irwin Allen’s sci-fi series Land Of The Giants, starring Gary Conway, Don Matheson, Deanna Lund, and Don Marshall.
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The third and final crew of the first American space station, Skylab 4, lifts off for an 84-day stay. The crew’s tasks include medical and biological experiments, solar observations (including the first space-based recording of solar flare origination), and observations of Comet Kohoutek. Crewmembers Gerald Carr, William Pogue and Edward Gibson have a frank discussion with ground controllers about their extremely busy work schedule (similar to heated discussions between Apollo 7’s crew and Houston) halfway through the nearly-three-month mission. Skylab is left powered down, but still habitable, at the end of the crew’s stay, in anticipation that future Space Shuttle crews will someday occupy Skylab.
The 11th episode of Filmation’s live-action Shazam! series airs on CBS, starring Jackson Bostwick, Michael Gray and Les Tremayne.
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The first transmission from Earth designed to be a message for interstellar listeners is broadcast from the newly-refurbished Arecibo Radio Telescope in Puerto Rico. Weighing in at 210 bytes, the message is a binary transmission that, when properly assembled, provides a graphical representation of Earth’s solar system, a human being, the makeup of human DNA and the elements from which it is constructed, and the population of Earth. Though the Arecibo dish is pointed in the direction of the M13 globular cluster at the time of the message’s transmission, that cluster will have moved in the 25,000 years it takes for the message to reach that location (and, in any case, Earth and its entire solar system will have moved in the 25,000 additional years it would take to receive a reply), so the message is more of an interstellar technology demo than a message in a bottle.
The 46th episode of The Six Million Dollar Man is broadcast on ABC, starring Lee Majors and Richard Anderson.
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NASA and its contractors mull over a report outlining an ambitious (and, considering the continuous delays to the first launch of the Space Shuttle program, overly optimistic) plan to reactivate and occupy the Apollo-era space station Skylab for use by shuttle crews. The plan involves outfitting the ailing station with new solar power panels and equipment, and performing repairs to make it habitable for future astronauts. Despite the best-laid plans, however, the shuttle’s first launch comes after Skylab tumbles back through Earth’s atmosphere.
The first episode of the English-dubbed Japanese action series Monkey premieres on BBC2, starring Masaaki Sakai. The series is a translation and dub of a fancifully satirical Japanese adaptation of the Chinese novel “Journey To The West”, and quickly gains a cult following in the UK.
The eighth episode of Carl Sagan’s groundbreaking science documentary series Cosmos premieres on PBS. A popular history of science and scientific theory vs. tradition and superstition, segueing into Sagan’s field of expertise (astrophysics), Cosmos is a major milestone in American documentary filmmaking and the popularization of science and the scientific method (and makes an instant celebrity out of Sagan).
BBC1 premieres the 47th episode of Terry Nation’s science fiction series Blake’s 7. Jacqueline Pearce and Stratford Johns guest star.
ITV premieres the fourth episode of the sitcom Astronauts, concerning a fictional British space station crew aboard Skylab.
The week-long national syndication window opens for the eighth episode of Star Trek: The Next Generation. This is the second Ferengi episode, and the first episode to delve into Captain Picard’s previous command, the U.S.S. Stargazer.
The 666th episode of Doctor Who airs on BBC1. Stubby Kaye and Don Henderson (Star Wars) guest star.
This timeline entry leads to an entry covering this entire Doctor Who serial; there are plans to write new episodic entries in the future. You can support this effort!
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Doctor Who now streaming on Britbox
BBC Records releases The Doctor Who 25th Anniversary Album, an album combining every version of the Doctor Who theme tune to date, along with selections of music from seasons 24 and 25 by composer Keff McCulloch (including the just-aired Remembrance Of The Daleks).
The 676th episode of Doctor Who airs on BBC1. Though not generally known outside of the inner circle of the cast and crew, this story is intended to be a surreal parody of the Thatcher administration.
This timeline entry leads to an entry covering this entire Doctor Who serial; there are plans to write new episodic entries in the future. You can support this effort!
Order Earl Green’s book VWORP!1 from theLogBook.com Store
NBC airs the 38th episode of Donald Bellisario’s science fiction series Quantum Leap, starring Scott Bakula and Dean Stockwell. Amy Steel (Friday The 13th Part 2, The Powers Of Matthew Star) guest stars.
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The week-long national syndication window opens for the 134th episode of Star Trek: The Next Generation.
Rhino Records releases a selection of songs from the animated series Animaniacs.
The week-long national syndication window opens for the 25th episode of Babylon 5. Michael Ansara guest stars.
Virgin Publishing releases the 44th book in the Doctor Who: The New Adventures range, The Also People by Ben Aaronovitch.
The 100th episode of Chris Carter’s modern-day science fiction series The X-Files airs on Fox, starring Gillian Anderson and David Duchovny. Richard Belzer guest stars as John Munch, his character from Homicide: Life On The Street and Law & Order: Special Victims Unit, raising the unsettling (and perhaps unintentionally humorous) possibility of both shows existing in a shared universe with The X-Files.
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The 29th episode of Gene Roddenberry’s Earth: Final Conflict, airs in syndication, starring Robert Leeshock, Lisa Howard, Von Flores, and Richard Chevolleau.
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