Avengers (1963) #38-39 l 19

Enchantress tricks Hercules into wrestling the Avengers. When he snaps out of it, his daddy gives him a one year timeout on Earth. Since Herc is stuck there anyway, he decides to help the team face off against the Mad Thinker and his Triumvirate of Terror (more like "Terrible"). Black Widow gets conned into helping SHIELD. Cap takes off for a while. And, for as little as they do, Scarlet Witch and Quicksilver may as well disappear too.