Spiderman 1967 - Up from Nowhere
Thor and The Avengers: Molto and the Lava Men (1966)
Lava men are inhuman monsters that threaten all of humanity! Perhaps the Hulk can be persuaded to help the Avengers by a... friend? Great style!
Fantastic Voyage (1968) Ep. 2
Short-lived animated series based on the 1966 film of the same name about scientists who are miniaturized and injected in humans