After a health scare on Halloween, Walden decides he needs to change his life.

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

Alan and Walden have a meeting with an adoption social worker that hinges on them being convincing as a loving couple. Lyndsey returns after 60 days in rehab.

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

Walden becomes a foster parent to a 6-year-old boy, but worries about himself when they don't hit it off like he hoped.

Alan breaks Walden's rules when he realizes that Louis thinks he's cool, and he wants it to stay that way.

Alan and Walden befriend three moms at a kids’ gym, but things get complicated when Walden becomes attracted to one of them. Alan goes out for a girls’ night with a group of moms.

Alan and Walden attempt to convince Louis that Santa Claus is real.

Walden discovers how challenging it is to be intimate with women when his foster son, Louis, is in the house. Also, Herb asks Alan if he can go on a date with Lyndsey.

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

When Alan breaks up with their social worker to get back together with Lyndsey, Walden worries it will affect Louis’ adoption.

Walden fears if he breaks up with Ms. McMartin, it will jeopardize his adoption of Louis. Also, Alan hesitates when Lyndsey asks him to move in with her.

After they sign their divorce papers, Walden offers Alan the gift of his choice, but when Alan chooses something selfish and impractical, it puts his relationship with Lyndsey on the line.

Charlie Harper is alive. Or is he?

Charlie Harper is alive. Or is he?