Season 10: Episode 6 - Ferrets, Attack!

Ferrets, Attack!: Shortly after Walden asks Rose to move in, Zoey tells him she made a mistake and wants to give their relationship another try provided he wasn’t getting too serious with Rose. Walden decides he wants to be with Zoey and breaks up with Rose just as she is moving in. Rose heads to Zoey’s apartment pretending to be six month pregnant and claims that Walden asked her to carry his babies. As Walden tries to explain the fake pregnancy to Zoey, he lets slips that he had asked Rose to move in. Zoey walks out on him, angry that he lied about how serious their relationship was.