Whitney realizes that she and her long-term boyfriend are in a rut.

When Whitney realizes that she and Alex have never gone on an official first date, she comes up with an unusual idea to recreate the past.

When Alex won't fess up to checking out a hot girl, Whitney decides that the best punishment is the silent treatment.

Lily is on edge with anticipation that Neal might propose, while Whitney and Alex compete to see who can be more romantic.

Whitney and Mark conspire to catch Alex's condescending tone of voice by setting up cameras around the apartment.

When Alex encourages Mark to recycle his beer can, Mark's firm stance against it causes the two to "break up."

When Whitney discovers Alex has given up some of his interests since dating her, she is determined to share them with him.

When Alex's childhood dog passes away, Whitney suggests they adopt a dog together. However, the adoption process isn't as easy as they'd hoped.

Whitney battles insomnia after Lily makes her the maid of honor, and she decides to pay a visit to her psychiatrist. Chelsea Handler guest stars!

Whitney and Alex scheme to skip out on their family holiday gatherings. Jane Kaczmarek and Peter Gallagher guest star!

After a trust breakdown, Whitney takes some solo time - only to return home and find Alex in a compromising position.

Whitney fakes being interested in Lily's wedding plans; Alex pretends to be young and hip to reboot his Internet career.

Roxanne hires Whitney as her office assistant to spy on her work nemesis. Guest starring Kathy Griffin!

Whitney and Alex visit a couples therapist to improve their communication and intimacy. Guest starring John Cleese!

Whitney goes on the offensive when she learns Roxanne has reunited with her ex-husband; Lily tries to hide from Neal that she lost her engagement ring.

After Mark shares his theory on proper dating rules, we flashback to discover how Whitney and Alex first met!

Whitney gets more than she bargains for when she entices Alex with an enhanced look; A discussion on signing a prenup leaves Lily and Neal's marriage up

Whitney has a surprising reaction when she's mugged; Lily and Neal come to a crossroads in their relationship.

Whitney's curiosity is piqued when she finds a box of items from Alex's ex-girlfriend; Lily tries to be the perfect roommate with Roxanne, to devastating effect.

Whitney and Alex help Neal discover his true self as he begins to question his sexuality.

After Alex attends a wild bachelor party, he drunkenly proposes to Whitney; Mark realizes he may have romantic feelings for Roxanne; Lily and Neal try to adjust to their new relationship.

Season Finale! Whitney seeks her father's help when she runs into complications trying to obtain a marriage licensee with Alex. Guest starring Peter Gallagher.