Fantastic Four #196

WHO IN THE WORLD IS THE INVINCIBLE MAN? A newly reunited Sue, Ben and Johnny have all been attacked and abducted by the Invincible Man using the Psycho-Man's hypnotic powers. When they are imprisoned, it is revealed that the Invincible Man is none other than Reed, who has been equally hypnotized.  The four members attempt to break out of the holding cell, but they are shot with sleep gas as the Mastermind behind the entire elaborate scheme reveals himself... DOCTOR DOOM!