''Ultra Q'' (ウルトラQ or ''Urutora Kyū'') is a {{toku}}satsu [=SF/=]{{Kaiju}} series made in the tradition of Creator/{{Toho}}'s many tokusatsu sci-fi/horror films.

Produced in black and white by Tokyo Broadcasting System/Tsuburaya Productions, ''Ultra Q'' is actually the first of the long-running ''Franchise/UltraSeries'', and was broadcast on Tokyo Broadcasting System from January 2 to July 3, 1966 (the final episode was preempted until December 14, 1967), with a total of 28 episodes. This series was followed a week later by the more well-known ''Series/{{Ultraman}}'' (''Urutoraman'', 1966), the second ''Ultra'' Series.

[[EarlyInstallmentWeirdness Unlike most of the franchise it would spawn]], it did not have a size-changing HenshinHero. Instead, it was more of a mystery-of-the-week format that gets it compared to ''Series/TheOuterLimits'' (even with an intro reminiscent of it!) with, of course, giant monsters being the culprit a lot more often than it was in those series.

Two reimaginations of the series were released, ''[[Series/UltraQDarkFantasy Dark Fantasy]]'' and ''Series/NeoUltraQ''.

!!''Ultra Q'' provides examples of the following tropes:

* EggMacGuffin: Litra's egg in the first episode, as Litra is the only thing capable of killing the monster Gomess, so they try to hatch the egg in the hopes that Litra will take care of the rampaging monster for them.
* InstrumentalThemeTune
* {{Kaiju}}: Plenty.
* OpeningNarration: "For the next 30 minutes, your eyes will leave your body and enter inside this fantasy time..."
* {{Theremin}}: The music and the theme had this and the musical saw.