A pretty good paranoia piece from the early 1970s. I think Pakula would go on to do better work but this is still worth a look thanks to the close attention to characterisation, the psychological depth, and the eerie and ominous atmosphere which makes you feel like you're watching HALLOWEEN at times. Sutherland and Fonda are both excellent in the lead roles, although the title is slightly problematic given that Sutherland's role is far more extraneous than Fonda's. A real slow-burner, but engrossing with it.