Great Sky Demon Dragon Gaiking (大空魔竜ガイキング, Daikū Maryū Gaikingu?) was a Super Robot mecha anime series produced by Toei Animation, credited as an original idea by Akio Sugino. However, in reality the original idea was of Go Nagai. Toei deliberately took Nagai out of the credits in order to avoid the payment of royalties. Because of that, Nagai sued Toei and stopped further collaborations with Toei for a long time. The legal battle lasted more than 10 years. Nagai himself confirmed that he was the creator of Gaiking in the Comicon 2007 in Naples, Italy.

It ran from April 1976 through January 1977 and consisted of 44 26-minute episodes. Gaiking was notable for being one of the few super robot series to take place in real places outside of Japan, and for being the first Super Robot series to have a mobile carrier for the chief robots. Gaiking was part of Jim Terry's Force Five anthology series.

Source: Wikipedia