The fourth episode of the syndicated horror anthology series 13 Demon Street airs on stations across the U.S. Hosted by Lon Chaney Jr. (The Wolf Man), and created (and frequently written and directed) by Curt Siodmak (The Wolf Man, The Invisible Man Returns), the series was filmed in Sweden with a motley mixture of American, British, and Swedish actors, with mostly Swedish talent behind the scenes. John Crawford (The Poseidon Adventure) guest stars.
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CBS airs the 
The 91st episode of Doctor Who airs on the BBC. This is part one of the mammoth 12-part story now collectively known as 
The tenth episode of the time travel sitcom It’s About Time, created by Sherwood Schwarz (I Dream Of Jeannie) and starring Frank Aletter, Jack Mullaney, and Imogene Coca, is broadcast on CBS.
The 67th episode of Irwin Allen’s adventure series Voyage To The Bottom Of The Sea airs on ABC, starring Richard Basehart and David Hedison. Terry Becker guest stars.
The unmanned NASA/JPL space probe Mariner 9 enters orbit around Mars, becoming the first human spacecraft to orbit another planet in the solar system. The probe begins a nearly year-long survey of the red planet, mapping over 70% of its surface at a much higher resolution than was achieved by the previous NASA Mars probes, Mariners 6 and 7. Mariner 9’s mapping mission is temporarily delayed by a global dust storm obscuring the entire planet when the orbiter arrives. Among its discoveries are Olympus Mons, the solar system’s largest volcano, and the gigantic canyon later named Valles Marineris. Mariner 9 also gathers images of Mars’ two moons, Phobos and Deimos.
The 
The 
ABC airs the 
NBC airs the tenth episode of Monster Squad, a live-action Saturday morning comedy starring Fred Grandy. Geoffrey Lewis guest stars.
ITV broadcasts the fifth episode of horror anthology Beasts, created and written by Nigel Kneale (Quatermass). Patrick Magee (A Clockwork Orange, Chariots Of Fire) stars.
The 
CBS airs 
ABC airs 
The 88th episode of The Six Million Dollar Man is broadcast on ABC, starring Lee Majors and Richard Anderson. Jack Colvin (The Incredible Hulk) guest stars.
NASA launches the second High Energy Astronomy Observatory satellite, which is given the nickname “Einstein” when it enters service. HEAO-2 is a dedicated X-ray telescope with unprecedented sensitivity and accuracy, and will remain in service through March 1982, re-entering Earth’s atmosphere a week afterward.
Key to NASA’s claim that the 
CBS airs the seventh episode of Ron Koslow’s fantasy series Beauty and the Beast, starring Linda Hamilton, Ron Perlman, and Roy Dotrice. Michael Ensign guest stars.
The sixth 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. Shari Shattuck guest stars.
The week-long national syndication window opens for 
Fox Network airs 
The sixth episode of She-Wolf Of London is broadcast in syndication in North America, a co-production between Universal Studios and British broadcaster HTV, and starring Kate Hodge and Neil Dickson. Roger Brierly (Doctor Who) guest stars.
NBC airs the 60th episode of Donald Bellisario’s science fiction series Quantum Leap, starring Scott Bakula and Dean Stockwell.
Fuel Records releases the 
NBC airs the second episode of the science fiction series Earth 2, starring Debrah Farentino, Clancy Brown, and Antonio Sabato Jr. Tim Curry (The Rocky Horror Picture Show) guest stars.
The 28th episode of Lois & Clark: The New Adventures Of Superman airs on ABC, starring Dean Cain and Teri Hatcher. John Pleshette and William Devane guest star.
Cable channel TNT buys a package of reruns, presuming a three-season, 66-episode run, of the science fiction series Babylon 5, to begin airing in 1998. As TNT and PTEN are both owned by Warner Bros., the deal is seen as an “inside trade” among corporate siblings for a series unlikely to have a wide market for buyers in rerun form. Unknown to anyone at the time, this deal will have a major impact on the series’ future, particularly when the PTEN network begins to fall apart.
The week-long national syndication window opens for 
UPN airs the