to their old home and Stephen's hidden base, where she apparently betrayed them again. Mary flashed Chuck with a device that apparently neutralized the Intersect, allowing her to capture the pair alongside Tuttle, now revealed as Alexei Volkoff. However as Volkoff set charges to destroy Stephen's base and intelligence, Mary surreptitiously slipped Sarah a razor to allow them to escape, and asked her to protect her son. In "Chuck Versus the Leftovers" Volkoff finds out Chuck survived the explosion and sends Mary to make sure his assassins finish off Chuck. Instead she takes out the assassins and takes Chuck back to Castle. Volkoff storms the Buy More trapping team Bartowski to rescue Mary because he is in love with her. Chuck is furious but she swears that they were never together. Mary admits Chuck is her son to save his life and Volkoff decides he should join them for Leftovers dinner to meet her family. When Volkoff feels Chuck has betrayed him by sending Ellie and Devon away, Mary saves him again by telling Volkoff she can not love someone who would hurt her family. She leaves with Volkoff telling Chuck she hopes he can trust her one day. He says he does. In "Chuck Versus the Gobbler", Sarah goes under cover as a double agent working for Volkoff essentially becoming Mary's partner. Her plan is to have Sarah free Yuri "the Gobbler" from prison to gain access to Hydra, Volkoff's network. When Volkoff destroys the copy hidden in Yuri's false eye and downloads it to another location, Mary retrieves a piece of the micro chip. In "Chuck Versus the Push Mix", Volkoff discovers Mary's betrayal. She tells him that her husband is ten times the man he is and she never stopped thinking of him. A united Team Bartowski retrieves Hydra, arrests Volkoff and frees Mary to be with Ellie when she gives birth to Clara. Mary becomes a nearly ideal grandmother telling Ellie she wants to give Clara everything she didn't give her children. Though she loves having her mother, Ellie admits that she can't keep Mary from being a hero as she did to Chuck. Having come in from the cold of deep cover, Mary has access to Castle and the files on Volkoff Industries. Her relationship with Brigadier General Beckman is implied in "Chuck Versus the Family Volkoff" to have been long and generally positive; she