Return of Ultraman (帰ってきたウルトラマン - Kaettekita Urutoraman - roughly meaning "Ultraman Has Returned") is a tokusatsu SF/kaiju/superhero TV series, and is the 4th Ultra Series.

Eiji Tsuburaya originally intended for the Ultra Series to end with the 1967 series Ultra Seven, but Ultraman was too famous a character to keep down. After Eiji's passing in 1970, his son Hajime Tsuburaya (who took over Tsuburaya Productions until his death in 1973) revived the Ultra Series with Return of Ultraman.

Featured in this show is a new Ultraman named "New Ultraman" (新ウルトラマン - Shin Urutoraman), or just "Kaettekita Ultraman" (帰ってきたウルトラマン), like the show's title. In the late 70s-early 80s, however, he was renamed "Ultraman Jack" (ウルトラマンジャック - Urutoraman Jakku) for licensing, after Tsuburaya and Bandai (which had just bought the Ultraman toy license in Japan) held a contest for children to pick a new name for this Ultraman. Although he is called "Ultraman Jack" for licensing in and out of Japan, he is still sometimes referred to as "New Ultraman"/"Kaettekita Ultraman", especially by some fans (and also in some official sources).

Ultra Q (ウルトラＱ - Urutora Kyû) is a tokusatsu SF/kaiju series made in the tradition of Toho's many tokusatsu sci-fi/horror films.

Produced in B&W by Tsuburaya Productions, this is actually the first of the long-running Ultra Series, 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 popular Ultraman, the second Ultra Series.

Ultra Q can be described as a half-hour Toho kaiju film. Although series creator Eiji Tsuburaya intended this series to be more like The Twilight Zone and focus less on the monsters, TBS convinced Eiji to add more monsters onto the show, as Godzilla and Gamera were very popular at the time (the first "Kaiju Boom" was already born). This series predates The X-Files, as it is a show with continuing characters who investigate strange supernatural phenomena, be it giant monsters, aliens, ghosts, and other assorted calamities.

Ultra Seven (ウルトラセブン - Urutora Sebun) is a fictional superhero featured in tokusatsu TV shows.

He first appeared in Ultra Seven (the second Ultra Series), the famous tokusatsu SF TV series that aired on Japanese TV in 1967. Created by Eiji Tsuburaya, this follow up to Ultraman went on to become one of Japan's greatest fantasy TV series, even surpassing Ultraman itself in most fans view. Ultra Seven is considered by some to be Japan's answer to Star Trek, and the best of the Ultra Series. Such is his popularity that Ultra Seven (or simply 'Seven') has appeared or at least made cameos in nearly every Ultra series following his own and has had far more exposure than even the original Ultraman (though the original Ultraman is without a doubt the face of the Ultras). (Wikipedia)

Ultraman Dyna (ウルトラマンダイナ in Japanese) is a japanese tokusatsu TV show which aired between September 6, 1997 to August 29, 1998. Light-hearted sequel to Ultraman Tiga that takes place on the Neo Frontier of space. The series had 51 episodes.

Ultraman Dyna set seven years later in AD 2017, when humans are embarking on terra-forming Mars and other planets in what is known as the Age of the Neo Frontier. The series begins with the Neo Frontier being attacked by the Spheres, some UFOs that show up on occasion throughout the series. Asuka has just joined SuperGUTS and is in the middle of training maneuvers above Earth's atmosphere when they are attacked. He proves himself in battle, and can hold his own against ace pilot Ryoh. However, his ship is damaged and he ejects. He is then encountered by a shining light, Ultrman Dyna. Following that all-too-familiar pattern, Dyna merges with the bewildered Asuka. When the Spheres enter Mars' atmosphere and merge with the Martian rocks to form monsters, Asuka again participates in the battle, but when he finds himself in a pinch, he suddenly transforms into Ultraman Dyna. The members of Super GUTS quickly catch on that this is not Ultraman Tiga from seven years ago, but a new giant of light. (Wikipedia)

The 7th show in the Ultraman Series, airing between April 12, 1974 to March 28, 1975, with a total of 51 episodes.

Ultraman Taro (ウルトラマンタロウ - Urutoraman Tarō) is the title superhero of a tokusatsu SF/kaiju/superhero TV show, and is the 6th show in the Ultra Series. Produced by Tsuburaya Productions, this series aired on Tokyo Broadcasting System from April 6, 1973 to April 5, 1974, with a total of 53 episodes.

In a move similar to the previous series, Ultraman Ace, this series has a more comical feel and appeals greatly to children, an audience which made this one of the more popular Ultra Series, although adult fans have a different point of view. Up until the 1990s, this was also the most expensive of the Ultra Series.

Taro is one of the most typical name of a boy in otogi-banashis, or, Japanese fairy tales. The producer said, 'Ultraman Taro is going to be the fairy tale in Ultra Series.'

The actual child of the Mother of Ultra and the Father of Ultra, he is ostensibly one of the strongest Ultramen, although he seems to get killed a lot and receives a lot of help from his mother, father, and all of his brothers. Taroh gets his head chopped off by Enmargo in Episode 14, and gets killed by Birdon in Episode 18.

Ultraman Tiga (ウルトラマンティガ (Urutoraman Tiga) in Japanese) is a Japanese tokusatsu TV show and is the 12th show in the Ultra Series. Produced by Tsuburaya Productions, Ultraman Tiga was aired between September 7, 1996 to August 30, 1997, with a total of 52 episodes. After a franchise hiatus of over 15 years, set in a universe different from all previous series and updated with a new look and feel. Tiga is the first Ultraman with multiple combat modes and non-red colors. (Wikipedia)

Ultraman: Towards the Future is a tokusatsu SF/kaiju/superhero TV series produced in 1990 in Australia by the South Australian Film Corporation and Japan's Tsuburaya Productions (the creators of the Ultraman character). There were 13 episodes filmed (the first 6 episodes were the "Goudes Threat" story arc). Titled Ultraman Great (ウルトラマングレート or ウルトラマンG - Urutoraman Gurêto) for its Japanese release, the 13-episode show was originally featured on home video there later that year, and was later broadcast on Tokyo Broadcasting System from July 8 to September 30, 1995. This was the 10th Ultra Series and the first produced in the Heisei era.

Distributed in the United States by Sachs Family Entertainment, the show was broadcast Saturday mornings at 7:00 am on the Fox Network from January 4 to March 28, 1992.