Plot summary
Emily finds out about Charlie's affair with Kathleen and they break up. Kathleen tells him that she does not want to be just another woman he has sex with and then rejects the next day, and wants to take their relationship ahead. Meanwhile, Sarah is mad at Bailey because he did not tell her about his college plans by planning to move away to college to start his life over. Robin Merin meets Sarah for the first time and introduces herself as Sarah's biological mother. Robin later tells Sarah that she's leaving in two days for an acting job in Hollywood.
Sarah asks her to stay, and Robin gives Sarah her cat, promising that she will return. Also, Claudia is trying to get closer to her grandfather Jake, and she asks him to move into the house. Julia tells her how much their mother hated him for abandoning her and their grandmother. Jake tells Julia that he wants to be a part of the family, and so she accepts him, thinking that their mother would have done the same.
Credits
Adapted from Wikipedia contributors, List of Party of Five episodes. HTML formatting and reference markers removed.