I've created a new forum for Falling Skies so we can talk without spoiler tags now. I agree that Tom Mason has changed character. Do you think that is a natural progression from the loss of his daughter and everything that has happened? Or is there some other sinister controlling influence (as we are being lead to believe)? Given what has happened before with mind control, brainwashing, parasites and cyber-implants, I'm not sure I could trust a man who cannot explain how he got back from the Moon and has several days of missing memory, yet he can see his dead first wife and she gives him military intelligence.
Yeah, as Ricky Ricardo frequently told Lucy, Tom's got "a lotta 'splainin' to do." I can see how he might hallucinate about his dead wife while immersed in what might well have become his watery grave. I can't explain the hint he got concerning the location of the Espheni Overlord. Only a former history professor would recognize a bust of Woodrow Wilson and make the connection.
My guess is that his daughter, otherworldly hybrid that she was/is, has remained with him in some form, maybe on another plane of existence or somehow implanted in his mind. He might be talking directly to her in a dream scene to come.
I don't know if the fly thing at the end of the episode is significant. Anne had given him a clean bill of health. Assuming that she knows what she is doing, he didn't return to camp as a remotely controlled spy. Maybe that's why the Overlord was so chatty. He was maneuvering to get the fly placed while Tom was distracted, and he failed.
In the end, I think Tom's new angry man personality is just a reflection of a trait we all find when pushed far enough, and he certainly has been pushed. Then, it just could be the show's way of setting a kick-ass tone for the final season.
Personally, I thing the series lost its way when it wandered into the Tom as President and Lexi storylines. I'm looking forward to Humanity wiping out the remaining Espheni forces and taking back the planet.