September 1 - The outbreak of World War II brings television broadcasting at BBC to an abrupt end at 12:10pm in the middle of the Mickey Mouse cartoon, Mickey’s Gala Première. The last words broadcast are of a Garbo caricature saying "Ah tink ah go home". (The BBC would resume its broadcasting at that same point after the war in 1946)
The DuMont company begins producing consumer television sets
September 30 - The first televised college football game, Fordham vs Waynesburg College, at Randall's Island, New York.