Man From Atlantis: Man O’ War
The fifth episode of the science fiction series Man From Atlantis airs on NBC, starring Patrick Duffy and Belinda J. Montgomery. Victor Buono (Batman) and Gary Owens (Space Ghost) guest star. 
Roy Wood: Mustard
Jet Records releases Roy Wood‘s second solo album, Mustard, which shows off the ELO/Move co-founder’s penchant for ’50s-style rock and his ability to play every instrument in a given song by himself.
The Lost Saucer: Valley Of The Chickaphants
ABC airs the ninth episode of Sid & Marty Krofft’s The Lost Saucer, starring Jim Nabors (The Andy Griffith Show, Gomer Pyle USMC) and Ruth Buzzi (Rowan & Martin’s Laugh-In). Jean Ross guest stars.
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Doctor Who: Pyramids Of Mars, Part 2
The 411th episode of Doctor Who airs on BBC1. Michael Sheard (The Empire Strikes Back) and Gabriel Woolf guest star in an episode regarded by many fans as one of the series’ all-time classics.
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The Kolchak: The Werewolf
ABC airs the fifth episode of Kolchak: The Night Stalker, based on the 1973 TV movie The Night Stalker and starring Darren McGavin. Eric Braeden guest stars.
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Six Million Dollar Man: The Seven Million Dollar Man
The 18th episode of The Six Million Dollar Man is broadcast on ABC, starring Lee Majors and Richard Anderson. Monte Markham guest stars.
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Search: The Bullet
The seventh episode of Leslie Steven’s “spy-fi” series Search airs on NBC, starring Hugh O’Brian and Burgess Meredith. Malachi Throne and Ina Balin guest star.
Viking… to Mars!
NASA begins making detailed plans for a pair of orbiter/lander spacecraft, now named Viking, to be sent to Mars in the mid 1970s (possibly as early as 1973). With more recent Mariner missions having revealed a number of major challenges, including a thin atmosphere which won’t significantly slow a heavy object such as a landing vehicle, mission planners have to consider entirely new methods of reentry (as opposed to the Earthlike atmosphere that was expected as recently as 1964). The twin Viking spacecraft will not lift off until 1975.
Star Trek: Day Of The Dove
The 62nd episode of Gene Roddenberry’s science fiction series Star Trek airs on NBC. Michael Ansara guest stars as Kang.
The Twilight Zone: Living Doll
The 126th episode of Rod Serling’s The Twilight Zone airs on CBS. Telly Savalas stars.
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The Twilight Zone now streaming on Paramount Plus
Arecibo!
Nestled into a mountainous forest region of Puerto Rico, the Cornell University-funded Arecibo Radio Telescope officially begins operations. With a diameter of a thousand feet, this remains the world’s largest radio telescope until the 21st century. Studies of Earth’s ionosphere are high on the priority list, but radio astronomy isn’t far behind, and important discoveries are made at Arecibo within months of it opening.
One Step Beyond: To Know The End
ABC airs the 68th episode of the supernatural anthology series One Step Beyond, hosted and directed by John Newland. Elen Willard guest stars.
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Ivy Mike
The United States conducts the first-ever successful test of a thermonuclear bomb at Enewetak Atoll in the Pacific Ocean as part of Operation Ivy. The explosion resulting from the first hydrogen bomb test has a yield equivalent to 10 megatons of TNT, with a three-mile blast radius, stripping vegetation from the ground in the surrounding area. There is significant radiological fallout from the event, and one pilot assigned to fly a jet fighter through the area an hour after the detonation loses control of his plane, crashes, and dies due to residual radiation interfering with his instruments and controls. Traces of the previously undiscovered (but theorized) elements einsteinium and fermium are found afterward.
Weather Radio: all weather, all the time
The U.S. Weather bureau signs on radio station KWO35, located at New York’s La Guardia Airport, broadcasting weather forecasts primarily for the benefit of pilots. Not targeted for public consumption, the experimental station broadcasts for several hours a day at a frequency of 162.55Mhz, outside of the spectrum reserved for FM radio. A similar station on the same frequency will later sign on at Chicago’s O’Hare Airport in 1953, again mainly for the consumption of airline pilots. Marine forecasts are added later, and the system helps the Weather Bureau prevent its local forecasters from being overwhelmed by requests for “personalized” weather reports for pilots. These two stations are the precursor for the nationwide weather radio network operated by the Weather Bureau’s successor agency, the National Weather Service.