Plot holes
Problem 1: Why did Dreyman and Co. come up with an elaborate hoax of smuggling someone across the border (to test whether his apartment was bugged), when they could have just checked behind the light switches?
Problem 2: Weisler interrogates Sieland. He warns her that if she lies, she will be imprisoned for perjury. He persuades her to confess the location of the typewriter...then goes and hides the typewriter himself??? Leaving Sieland to be arrested for either perjury (saying the typewriter is somewhere it isn't) and/or for tipping off Dreyman? I just don't get it. Even if hiding the typewriter gets Dreyman off the hook, it just incriminates Sieland. Wasn't Weisler's goal to save them both?
Problem 3: If the government was really that skeevy, why didn't they just frame Dreyman to start and have done with it?
The second problem is what really ruins the credibility of the story. Is there any rational explanation for Weisler's actions?