I'm in two minds about this series. The production and characterisation are very good, but the plot holes are making it more and more impossible to believe.
- Carrie's supposed to be a senior agent, very good at her job. Yet, knowing that Helen Walker is on the phone to Tom, she goes around the house shouting into her own phone. Great work - if Walker hears her, he'll hang up straight away. As he did when Carrie found Helen outside and promptly started shouting at her. You can only explain so much by saying "oh, she's bipolar." If it affected her work to that extent, she'd be out of a job. Are the CIA so incompetent?
- The CIA believe that Tom Walker was smuggled back into the country to assassinate the President. Yet the main value of a "turned" soldier is that he won't be suspected - he can get through a lot of security barriers, as Brody has done. So why would the terrorists try to convince everybody that Walker is dead? Why waste him on a job that could be done by any expert marksman? Either it's very lazy writing, or the terrorists have another task for Walker. Again, it makes the CIA look pretty stupid.
- As others have said, Walker being alive doesn't prove that Brody hasn't been turned, but even Paranoid Carrie doesn't seem to suspect him now.
It's a good romp, and I fully intend to watch the rest of the series, but serious drama it ain't.