Previously on Two and a Half Men Season 10 Episode 11 "Give Santa A Tail-Hole", Walden juggles having two identities - rich man and poor man - and Alan finds himself alone at Christmas.
On this week's Episode title "Welcome to Alancrest", Using Walden’s money, Alan invests in Kate’s fashion line. Meanwhile, leading a double life starts to take its toll on Walden.
The series revolved initially around the life of the Harper brothers: Charlie (Charlie Sheen) and Alan (Jon Cryer) and Alan's son, Jake (Angus T. Jones). Charlie is a bachelor who writes commercial jingles for a living while leading a hedonistic lifestyle. When Alan's wife Judith (Marin Hinkle) decides to divorce him, he moves into Charlie's Malibu beach house, with Jake periodically coming to stay. Charlie's housekeeper is Berta (Conchata Ferrell), a sharp-tongued woman who initially resists the change to the household but comes to grudgingly accept it.
The first five seasons find Charlie in casual sexual relationships with numerous women until the sixth season, when he becomes engaged to Chelsea (Jennifer Bini Taylor). However, the relationship does not last when Charlie flies to Paris in the eighth season finale in pursuit of Rose (Melanie Lynskey), who was introduced as his stalker in the pilot episode. In the ninth season premiere, it is revealed that Charlie died when he fell in front of a subway train in Paris; it is strongly hinted that Rose allegedly pushes Charlie in front of the train after learning that Charlie had cheated on her.
Alan's experiences are somewhat different from Charlie's. Throughout the series, Alan continues to deal with the results of his divorce from Judith, Jake growing up, and his generally little success with women. Even his marriage to Kandi (April Bowlby) at the end of the third season was short-lived. In the fourth season, Alan is back at the beach house paying alimony to two women out of his meager earnings as a chiropractor. In the seventh season, he begins a relationship with Lyndsey McElroy (Courtney Thorne-Smith), the mother of one of Jake's friends. Their relationship is temporarily suspended when Alan accidentally burns down her house and cheats on her, but the relationship eventually resumes.