The Fat Controller
Mr. Arkwright is an engine driver and a close assistant to The Fat Controller. Introduced in the 2009 video "Team Up With Thomas," Arkwright presents live-action segments between the stories in which he instructs viewers to help him in a project, such as creating an engine out of cardboard boxes for The Fat Controller's grandchildren. His office is located in the engine drivers' locker room at Knapford Station. Displayed inside the office are portraits of The Fat Controller and the engines.