The Falcon And The Snowman (1985)

Synopsis:
Timothy Hutton and Sean Penn play two young men from wealthy families who sell government secrets to the Russians.
Boyce (Hutton), whose job it is to guard top-secret government papers, becomes disillusioned with the United States and decides to make a deal with the Soviets. His partner in espionage is propelled by less-ideal reasons for his acts, as Penn plays a grungy drug addict in it for the money.

Starring:
Timothy Hutton
Sean Penn
David Suchet
Lori Singer

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