UNCANNY X-MEN (1963) #34

Professor X is missing, and Cyclops and Beast are attempting to repair Cerebro. There’s nothing for the other X-Men to do, so they decide to get some rest while Jean returns to college. Jean receives a call from Ted Roberts, warning her that his brother Ralph had been captured and that she must call the X-Men to help him. Jean thinks he knows about her secret identity, but still calls the others and tells the story. Angel and Iceman get the plane, catch Marvel Girl and go find Ralph. Ted tells them that a man called Tyrannus kidnapped his brother because of his work with cobalt and took him to the core of the Earth.…