Dennis Krellig

Dennis Krellig was a scientist who once tried to take over the Earth, but was stopped by the Eighth Doctor and Charley. A few weeks later, Dennis began to work at a biscuit factory, where he used his bosses' computer to hack into the National Defence System. He attempted to launch nuclear warheads all around the Earth but was stopped by a cleaner at the factory named Maureen. Dennis decided to renounce his plans for world domination and marry Maureen. (ST: Second Chances)