The 34th episode of the syndicated science fiction Science Fiction Theatre airs on stations across the U.S. Hosted by Truman Bradley, the episode stars George Brent, Steve Brodie, and DeForest Kelley.
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Toho releases the sixth Godzilla movie, Godzilla vs. the Sea Monster. 
The 141st episode of Doctor Who airs on the BBC. The second Doctor’s longest-running companion, Jamie McCrimmon, is introduced in this story. This episode is now missing from the BBC’s archives.
ITV broadcasts the 12th episode of The Prisoner, produced, occasionally written by, and starring Patrick McGoohan. John Sharpe guest stars as Number Two.
The 97th episode of Irwin Allen’s adventure series Voyage To The Bottom Of The Sea airs on ABC, starring Richard Basehart and David Hedison. Don Matheson guest stars.
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ABC airs the 12th episode of the modern-day science fiction series The Immortal, starring Christopher George.
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Dr. Tetsuya Theodore Fujita, a pioneering researcher in the formation and development of severe weather, proposes a scale for judging the intensity of tornadoes by the damage left behind. His five-point scale covers minimal tornadoes (F1) through storms capable of inflicting incredible damage (F5), with damage surveyed after a storm to determine the physical effects and the estimated wind speed needed to cause those effects. The Fujita Scale is adopted almost worldwide, remaining in widespread use by severe weather researchers and government agencies until it is supplanted by the more refined Enhanced Fujita Scale in the 1990s.
NBC airs the 38th episode of Night Gallery, an anthology series of original short plays and short story adaptations hosted by Rod Serling. Burgess Meredith guest stars.
The sixth episode of the British comedy series Robert’s Robots airs on ITV licensee Thames Television, starring John Clive (A Clockwork Orange, Yellow Submarine) as eccentric inventor Robert Sommerby and Nigel Pegram as one of his robot creations.
The 15th and final episode of Filmation’s Saturday morning science fiction series Space Academy airs on CBS, as Commander Gampu’s brother arrives on a mission to shut down the Academy. With Star Wars mania in full swing, Filmation decides to keep the Space Academy sets and costumes around, but reformat the show with new characters, actors and plotlines to cash in on the current sci-fi craze.
The 47th episode of The Bionic Woman, starring Lindsay Wagner and Richard Anderson, airs on NBC. Richard Erdman (Tora! Tora! Tora!, Community) guest stars.
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The 469th episode of Doctor Who airs on BBC1. Michael Keating (Blake’s 7) guest stars.
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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The 12th episode of Glen A. Larson’s science fiction series Battlestar Galactica airs on ABC. George Murdock guest stars.
Midway releases the arcade video game Wacko, a game designed to defy having its cabinet converted into another game with a unique asymmetrical design.
The 12th episode of the science fiction series The Powers Of Matthew Star airs on NBC, starring Peter Barton and Louis Gossett Jr. Sam Weisman (Mary Hartman, Mary Hartman) guest stars.
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The eighth episode of Glen A. Larson’s superhero series Manimal airs on NBC, starring Simon MacCorkindale, Melody Anderson, and Michael D. Roberts. Jeff Corey (The Outer Limits, Babylon 5) and Robert Englund (V, A Nightmare On Elm Street) guest star in the final episode; due to declining ratings, NBC has cancelled the series. MacCorkindale will reprise the role of Jonathan Chase in an episode of Larson’s 1990s superhero series, NightMan, appropriately titled Manimal.
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The 11th episode of the Hammer Studios-produced horror anthology series Hammer House Of Mystery And Suspense airs on ITV; the series will be shown later in the U.S. under the title Fox Mystery Theatre. Dean Stockwell (Quantum Leap) guest stars.
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The 48th episode of a revival of Rod Serling’s The Twilight Zone airs in syndication. Colleen Dewhurst stars.
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The Twilight Zone now streaming on Paramount Plus
The tenth episode of the horror anthology series Freddy’s Nightmares is broadcast in syndication in North America, hosted by Robert Englund in character as Freddy Krueger.
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The 33rd episode of the horror anthology series Freddy’s Nightmares is broadcast in syndication in North America, hosted by Robert Englund in character as Freddy Krueger.
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Fox airs the 15th episode of the sci-fi western, The Adventures of Brisco County, Jr., starring Bruce Campbell, Julius Carry, and Christian Clemenson. Kelly Rutherford (Melrose Place) and Vaughn Armstrong (Star Trek: Enterprise) guest star.
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The Adventures Of Brisco County Jr. now streaming on Amazon Prime
The 12th episode of Chris Carter’s modern-day science fiction series The X-Files airs on Fox, starring Gillian Anderson and David Duchovny, and guest starring Amanda Pays (Max Headroom, The Flash). This episode features one of the earliest TV appearances of actor Mark Sheppard (Firefly, Supernatural).
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The 54th episode of Lois & Clark: The New Adventures Of Superman airs on ABC, starring Dean Cain and Teri Hatcher. Robert Carradine and Beverly Garland guest star.
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Lois & Clark: The New Adventures Of Superman now streaming on Amazon Prime
UPN airs the 79th episode of Star Trek: Voyager.
The radio drama Blake’s 7: The Syndeton Experiment pemieres on BBC Radio 4, written by Barry Letts (Doctor Who) and starring original television cast members Paul Darrow, Jacqueline Pearce, Michael Keating, Steven Pacey, and Peter Tuddenham. As the story is set during the fourth season of the TV series, the roles of Dayna and Soolin have to be recast.
The 13th and final episode of children’s science fiction series Aquila premieres on BBC1, starring Ben Brooks and Craig Vye.
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The 168th episode of Chris Carter’s modern-day science fiction series The X-Files airs on Fox, starring Gillian Anderson and Robert Patrick. Keith Szarabajka and Wayne Alexander (Babylon 5) guest star.
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Big Finish Productions releases the fourth Dalek Empire audio drama, a Doctor Who audio spinoff starring Gareth Thomas (Blake’s 7) and Sarah Mowat.
The 132nd episode of Joss Whedon’s supernatural series Buffy The Vampire Slayer, starring Sarah Michelle Gellar, airs on UPN. James Marsters, Anthony Stewart Head, and Alyson Hannigan also star.
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Fox premieres