spy ring
network of spies
Duquesne Spy Ring
World War II spy ring
British military network in Iran
MI6 spy ring within Iranian military
Dame Blanche
resistance movement
Cambridge Five
former ring of spies in the United Kingdom
Ware Group
1930s Soviet espionage ring in the USA
Illegals Program
Russian espionage program
Portland Spy Ring
Soviet spy ring that operated in England
British civilian network in Iran
MI6 local spy ring in Iran
Lucy spy ring
World War II spy ring