Marvel Superheroes: Sub-Mariner aired as part of the Marvel Superheroes show. The series was a half-hour long and featured five different Marvel comic characters in their own cartoons - Captain America, The Incredible Hulk, Iron Man, The Mighty Thor, and Sub-Mariner. The show was Produced by Grantray-Lawrence Animation and it premiered in syndication in 1966.
Episodes
Season 1 (1966-1967)
13 Episodes In Season 1
Peril In The Surface World/So Spreads The Net/A Prince There Was
The Start Of The Quest/Escape To... Nowhere/A Prince There Was
Not All My Power Can Save Me/When Fails The Quest/The End Of The Quest
Atlantis Under Attack/The Sands Of Terror/The Iron Idol Of Infamy
The Thing From Space/No Escape For Namor/A Prince Dies Fighting
To Conquer A Crown/A Prince No More/He Who Wears The Crown
To Walk Amongst Men/When Rises The Behemoth/To The Death
Atlantis Is Doomed/The World Within/Quest For X-Atom
Beware The Siren's Song/Spell of Loralie/Return Of The Mud Beast
Ship Of Doom/Fall Of Atlantis/Forces Of Vengance
The Planet Of Doom/To Test A Prince/To Save A Planet
Doctor Doom's Day/The Doomed Allegiance/Tug Of Death
Let The Stranger Die...!/To Destroy A Tyrant!/Save A City!
Marvel Superheroes: Sub-Mariner aired as part of the Marvel Superheroes show. The series was a half-hour long and featured five different Marvel comic characters in their own cartoons - 
