The Osterman Weekend 

Once a year John Tanner spends a long weekend with his three best friends from college. When he is approached by a CIA agent who has evidence proving that his three pals are actually spy's working with the Soviet Union, he reluctantly allows, his house to be wired with video surveillance equipment so that the CIA can monitor the men over their weekend together in hopes of putting the traitors behind bars. However, Tanner soon realizes that the CIA's agenda is not all that it appears to be