Chuck Versus the Baby
Chuck Season 5 Episode 8 (12/30/11)
After finding out about a mysterious baby in Hungary at the end of the previous episode, this one picks up with flashback to five years ago. Sarah is on a mission and has a baby that she is supposed to deliver. Thinking that harm will come to the child, she gives it to her mother to keep hidden. She wants the baby to have the normal life that she never did.
In present day, Sarah's former handler comes looking for the baby. After bugging Sarah, he finds out that the kid is at her mother's. He goes there, but Sarah, Chuck and Casey are waiting for him and they take him out. Sarah's mom and the now five-year old girl sneak away to Chuck's house to hide with Morgan, Awesome, Ellie, and Alex. Sarah then finally reunites with her mom and new little sister.