Well 3 series. And some OVA's. Each series is it's own story I think. I should see more someday [I just have some Battle of the Planets DVD's, which have Gatchman as an extra].
There's also been 3 dubs of the first season- the 70's Battle of the Planets dub [which had earth posing as alien worlds- which all happen to look and act just like earth!- and added an R2D2 Ripoff, and his robot dog], and a dub made by Turner Broadcasting in the early 90's called G-Force [less editing, but with horribly cheap synth music. And ADV's new dub.
Then there's also Eagle Riders, a dub Bandai made of Gatchaman F, the 2nd series
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There's also been 3 dubs of the first season- the 70's Battle of the Planets dub [which had earth posing as alien worlds- which all happen to look and act just like earth!- and added an R2D2 Ripoff, and his robot dog], and a dub made by Turner Broadcasting in the early 90's called G-Force [less editing, but with horribly cheap synth music. And ADV's new dub.
Then there's also Eagle Riders, a dub Bandai made of Gatchaman F, the 2nd series