6 September 2010,
Below is the official description for Chuck Season 4 Episode 1: "Chuck vs. The Anniversary".

Chuck and Morgan go on a rogue globe-spanning mission to find Chuck’s mom. Meanwhile, Sarah and Casey follow a trail to Russia as they investigate the mysterious Volkoff Industries and its operative, Marco (guest star Dolph Lundgren). Back at home, Ellie delivers big news to her family. Bonita Friedericy also stars.