Charlie's successor in the Harper household, Walden dates Rose despite Alan's warnings against it because of what she did to his brother Charlie leading to his death. Alan and Lyndsey take Walden out to dinner, where they run into Zoey and her date, Peter. After dinner, Lyndsey, concerned for Walden, decides to set him up with one of her friends. After various double dates with bad results, Walden decides to stay single for a while. He goes out to Pavlov's where he meets Charlie's former stalker, Rose (Melanie Lynskey), and after saving her from choking to death on a peanut, the two hit it off. This news shocks Alan. He tries to warn Walden about Rose, describing her tactics and history, ((e.g. stalking Charlie until his death)) but Walden disregards them, as Rose explained everything to h