Two And A Half Men Season 9 Episode 2 - Judy Greer is introduced as Bridget, Walden's ex-wife.
Two And A Half Men (Hover)
Two and a Half Men Season 9 Episode 3 - Alan gives dating advice to Walden as he prepares to go out with Bridget; and Jake decides to drop out of school because that's what Walden did.
Two and a Half Men Season 9 Episode 8 - Walden redecorates, and the change unsettles Alan as it prompts him to think of losing Charlie.
"Slowly and in a Circular Fashion"
Walden's ex-wife and mother try to take control of his company, so he turns to Alan for help.