Master of the Land

The Master of the Land has the control of The Land of Fiction. The Master himself is enslaved by the computer the Master Brain.

When the Doctor and Zoe and Jamie are there, The Master of the Land is an old man, who originally was a writer from Earth. As a writer on Earth he wrote about Captain Jack Harkaway.

When the Doctor freed the old man, the Land of Fiction dissolved. (DW: The Mind Robber)

Later The Monk reactivated the land and turned a boy (called Jason), from Earth in 1993, into the new Master of the Land.

Sometimes the Master of the Land is called the Writer (NA: Conundrum)