Short TV guide article, not really spoilery at all. Mainly wanted to mention it because I liked this quote for some reason.
"Walternate is who he is because had his son stolen from him," Torv adds. "So, he went, 'F--- this, I'm going to take a deep breath and I'm going to get my son back at any cost.' And that's essentially what's driving him. It's not actually a negative or a nasty drive."