A man discovers that his best friends are actually spies -- or are they? -- in this thriller based on Robert Ludlum's best-selling novel. John Tanner (Rutger Hauer) is the host of a television news show who once a year spends a long weekend with three of his best friends from college, Bernard Osterman (Craig T. Nelson), Joseph Cardone (Chris Sarandon), and Richard Tremayne (Dennis Hopper). Tanner is approached by Lawrence Fassett (John Hurt), a CIA agent who has evidence proving that his three pals are actually agents working with the Soviet Union. With Tanner's reluctant approval, his house is wired with video surveillance equipment so that the CIA can monitor what Osterman, Cardone, and Tremayne say and do over their weekend together in hopes of putting the traitors behind bars. However, Tanner soon realizes that Fassett's agenda is not all that it appears to be. The Osterman Weekend was directed by Sam Peckinpah; it proved to be his last film, as he died a year after its release.
by Mark Deming synopsis