FANTASTIC FOUR (1961) #41

The brutal betrayal of Ben Grimm! The Frightful Four kidnap the Thing and force him into helping them defeat the rest of his team! Will they win? The Frightful Four have returned once again to do battle with the Fantastic Four, but this time they have an ace up their sleeve: The WIngless Wizard has devised a deadly new weapon- the ID MACHINE, a brainwashing device, that they have used on poor Ben, now a fighting mad member of the Frightful Four! This issue is a real shocker. After the Thing single handedly defeats each of his three former partners, knocking them all unconscious, each of them is placed in a restraint specifically created to negate his/her individual power.…