Not very good
Sloppy acting--including bad accents--ludicrous sets, and not very faithful to the real story of Aldrich Ames.
Whoever designed the sets has never been inside a US government office, much less at the CIA. Every wall space and every desk is not covered with pictures of the President and little and big American flags. The staff meetings were particularly silly. As noted, the accents were bad, but worse the actors seemed bored, and the story, which is an interesting one, was made boring by poor direction and writing.
Skip it.