Glenn Michael Souther (January 30, 1957 – June 22, 1989), also known as Mikhail Yevgenyevich Orlov, was an American-Soviet sailor and intelligence officer who defected to the Eastern Bloc in 1986. Souther had spied for the Soviet Union in the U.S. Navy from 1980 and transmitted important classified information to the Soviet secret services. Souther defected to the Soviet Union in 1986 after being investigated for espionage, gave up his U.S. citizenship, and was granted Soviet citizenship from the Presidium of the Supreme Soviet. Souther settled in Moscow, promoted to the rank of major in the KGB, and later awarded the Order of Friendship. Souther committed suicide three years after his defection at age 32.