Alan must face the consequences after revealing his identity to Larry.
Gretchen insists that Alan reveal his true identity to Larry; Walden, Barry and Jenny go on a road trip.
Alan finds an opportunity to make money; Walden addresses his co-dependency issues.
After reconnecting with Kate, Walden becomes convinced she is the one for him -- until he meets a woman named Vivian (Mila Kunis).
Walden's ex-girlfriend invites him to her boutique opening; Gretchen hopes to spend more time at Alan's home.
Lyndsey finds out about Alan's relationship with Gretchen; Walden has a difficult time telling Barry to find his own place.
Walden thinks his girlfriend is cheating on him; Alan starts dating Larry's sister, Gretchen (Kimberly Williams-Paisley).
Alan asks Lyndsey to choose between him and Larry; Jenny worries that she and Brooke are growing apart.
Alan finds out that Lyndsey broke up with Larry without telling him; Walden tries to prove he is a man's man.
Marty Pepper (Carl Reiner) proposes to Evelyn; Alan and Walden plan a bachelor party for Marty.
Lyndsey's boyfriend sets Alan up on a date; Walden wants to help Nicole with her project so she will have time to date him.
Walden teams up with a beautiful former employee (Odette Annable) on a new project; Alan gives Jenny advice about her girlfriend (Aly Michalka).
Jake sends Alan a Japanese delicacy; the house comes alive with questionable Christmas lyrics.
Walden goes on a date with an accident-prone model; Alan's date reveals surprising personal information.
When Alan and Lyndsey's affair puts Walden in danger, he is forced to accept Rose's (Melanie Lynskey) help.
Lyndsey's jealousy disrupts Walden's and Alan's dates with beautiful women.
Alan wants to set up a date with Lynda Carter once he learns Walden knows her; Walden begrudgingly agrees to invite Lynda over for dinner.
Alan tries to find out what Lyndsey's boyfriend has over him; Walden helps Jenny pursue her acting career.
Walden parties with Jenny and her attractive friends; Alan's illicit affair with Lyndsey is jeopardized.
When Berta hurts her back at work, Alan and Walden think she should retire.
Jenny moves in with Evelyn and her wealthy boyfriend, Marty (Carl Reiner).
Charlie's 25-year-old daughter arrives at the beach house, hoping to get to know her family.