The Overweight Controller

The Overweight Controller (aka the Fat Controller/Big Controller) is a character in Ernest the Engine & Others.

Biography
The Big Controller is the owner and supervisor of the railway on which Ernest the Engine Car, Stevie the Steam Train, and Gail the Guard's Compartment all work. He is never seen on screen throughout the entire series, but is mentioned several times by the characters, first in the episode The Fat Controller.