Ronan Sumners was the Gornt mayor of New Port City.

He found a way to harness sperantium, using it to power the city's teleportation system. He divided New Port City into zones and limited citizens' movement to prevent hatred, pollution, and terrorism.

He tried to harvest Iz's imagination, but she had a panic attack and teleported back to the pizza parlour where she worked. Following her death, Ryan Sinclair and Yasmin Khan found the teleportation system's core. Sumners tried to harvest their sperantium, but he was stopped by the Thirteenth Doctor and Graham O'Brien. He was teleported into a Pizza-Porter oven. (PROSE: Gatecrashers)

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