Charlie Harper is alive. Or is he?

Walden and Zoey's relationship suffers after they share a near-death experience. Meanwhile, Alan wonders if Lyndsey has a drinking problem.

Alan and Walden go to Kate's fashion show in New York so Walden can reveal the truth about his identity.

Walden breaks the news to Zoey that he is going into business with his ex-wife. Alan and Lyndsey try to cope with their mom's relationship.

Alan and Jake meet Walden Schmidt, a broken-hearted billionaire.

Walden goes looking for Mrs. Right while Alan has an opportunity to reconcile with Lyndsey.

Walden's ex-business partner shows up at the beach house looking to make peace.

Walden plans a big surprise for Zoey's birthday.

Alan has a difficult time coping when Lyndsey breaks up with him.

Alan finds out that Lyndsey broke up with Larry without telling him; Walden tries to prove he is a man's man.

Alan prepares Walden for a date with Bridget, while Jake decides to emulate Walden and drop out of school.

Walden's mother arrives and Alan is smitten with her, even as she reveals a secret about Walden's past that sends him into a downward spiral.

Charlie Harper is alive. Or is he?

Walden’s ex-wife and mother try to take control of his company, so he turns to Alan for help.

Alan and Lyndsey introduce their mothers. Jake and Eldridge get a ride from Walden to a party.

Alan is showered with love and affection upon returning from the hospital, but Zoey isn’t so sure it’s deserved.

Marty Pepper (Carl Reiner) proposes to Evelyn; Alan and Walden plan a bachelor party for Marty.

A birth mother considers having Walden and Alan adopt her baby.

Walden joins a group for adoptive fathers, and finds it to be a nice escape from Alan.

Walden deals with his ex-wife, Bridget.

Walden receives divorce papers from Bridget, but forgets his depression when he meets a girl who looks eerily like her.

Walden goes on a date with an accident-prone model; Alan's date reveals surprising personal information about herself to him.

Alan has second thoughts about getting married after he's asked to sign a pre-nup.

Alan has trouble accepting Lyndsey's seedy movie past, and Walden tries to cheer him up by throwing a party.

Jake has a crush on his chemistry tutor, who has a crush on Walden. Meanwhile, Alan obsesses over the journal his brother left him in his will.