British spy thriller set during the Cold War starring Laurence Harvey, Mia Farrow and Tom Courtenay. Eberlin (Harvey) is a highly reputable double agent based in West Berlin working for British and Soviet intelligence agencies. After many years of espionage he is weary and looking to retire, however, his latest British assignment proves to be his most challenging yet. He is tasked with taking out a deadly Russian spy named Krasnevin but there is a problem: Eberlin is Krasnevin.