Walden decides to change his life after a health scare on Halloween, but he wants Alan's help to do it.
Walden asks Alan to sign a pre-nup, giving him second thoughts about the marriage.
Lyndsey makes her return from rehab. Alan and Walden try and keep up the act that they are a loving couple when the social worker comes to visit.
A birth mother considers having Walden and Alan adopt her baby.
Walden looks after a foster child named Louis, but they don't bond the way he hoped they would.
Alan begins to disobey Walden's rules so that he will look cool in front of Louis.
Walden and Alan become friends with three moms, but things become complicated after Walden ends up falling for one of them.
Alan and Walden attempt to convince Louis that Santa Claus is real.
Walden soon finds out how difficult it is to be with women with Louis in the house.
Alan attempts to help Walden keep Louis after a social worker makes a surprising discovery.
After Walden joins a support group for adoptive fathers, he enjoys having some time away from Alan.
Walden is concerned that there could be an impact on Louis' adoption after Alan breaks up with their social worker.
Walden is concerned that ending things with Ms. McMartin will become an issue. Lyndsey asks Alan to move in with her.
After their divorce becomes official, Walden offers Alan a present.
Some details concerning Charlie Harper are revealed.
More details concerning Charlie Harper are revealed.