It will be either Neal or most likely Hook. Every other character is major in the over all world politics.
The new teacher going after Tom, guess who hired her. Turns out to be Red. Red has always warned Liz about her husband. I've long thought Tom is in Alan Alda's circle of power, with primary job as a cleaner. So Red can't help Liz by directly taking Tom out, so he hires this teacher to break the two up. If they get a divorce due to him cheating on Liz, Liz is then protected and Red potentially can take Tom out without blowback by Liz, or turn him against Alan Alda's character for information.
If it wasn't for the serious of the episode plotline, I would have loved to have Lester (Vik) say he used to work for the Buy More in LA, or tell us that MC is actually Jeff. That would have been drop dead hilarious for him to do that.
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