Morphoton was a city located on Marinus.
Morphoton was ruled by a group of disembodied brains that enslaved the populace by using Somnor Discs to create the mental illusion that the city was luxurious, when it was really a place of dirt and squalor. The brains were destroyed by Barbara Wright, thus freeing the inhabitants of Morphoton. (TV: The Keys of Marinus [+]Loading...["The Keys of Marinus (TV story)"])
The Morpho survived their city's fall by fleeing into its sewers, entering into a state of suspended animation. They remained there for ninety years before a Dalek ship crashed atop Morphoton. After the inhabitants of Marinus found the crew dead, the Morphos investigated the ship and salvaged the Dalek casings for themselves. The Morphos subsequently abandoned the ruins of Morphoton and made for Arbitan's island so they could claim the Conscience of Marinus for themselves. (AUDIO: Return to Marinus [+]Loading...["Return to Marinus (audio story)"])
The Eleventh Doctor mentioned this city to Ian Chesterton and Barbara when he met them. (COMIC: Hunters of the Burning Stone [+]Loading...["Hunters of the Burning Stone (comic story)"])