The Superman/Aquaman Hour of Adventure
Season 1, Episode 15: Justice League of America - Bad Day on Black Mountain
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An evil villain named Mastermind, challenges the Justice League by attacking Earth.
All Episodes - Season 1
Episode 1
The Atom - Invasion of the Beetle-Men
Episode 2
The Atom - The Plant Master
Episode 3
The Atom - The House of Doom
Episode 4
The Flash - The Chemo-Creature
Episode 5
The Flash - Take a Giant Step
Episode 6
The Flash - To Catch a Blue Bolt
Episode 7
Green Lantern - Evil is As Evil Does
Episode 8
Green Lantern - The Vanishing World
Episode 9
Green Lantern - Sirena, Empress of Evil
Episode 10
Hawkman - Peril From Pluto
Episode 11
Hawkman - A Visit to Venus
Episode 12
Hawkman - The Twenty Third Dimension
Episode 13
Justice League of America - Between Two Armies
Episode 14
Justice League of America - Target Earth
Episode 15
Justice League of America - Bad Day on Black Mountain
Episode 16
Teen Titans - The Monster Machine
Episode 17
Teen Titans - The Space Beast Round-Up
Episode 18
Teen Titans - Operation: Rescue