"Lauren Cohan and Timothy Dalton are back as Vivian and Alexei respectively. 'We'll delve deeper into the Volkoff story we've set up,' Yvonne Strahovski said in an interview. 'We'll see more of Chuck's mom, of course. And I think, later in the season, we'll touch on Sarah's family and what happened with her mother. How much we'll touch on that, I'm not sure.'"
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