1. I changed my mind about the milk

Walden plans a surprise for Zoey's birthday on the premiere.

2. A big bag of dog

Following his break-up with Zoey, Walden has a breakdown.

3. Four balls, two bats and one mitt

Alan and Lyndsey decide to spice up their love life.

4. You do know what the lollipop's for

Walden feels his age when a friend's daughter comes to visit

5. That's not what they call it in Amsterdam

Rose (MELANIE LYNSKEY) returns...and she's after Walden!

6. Ferrets, attack!

Walden has to choose between Rose and Zoey.

7. Avoid the Chinese mustard

Walden hires an actress to play his girlfriend.

8. Something my gynecologist said

Lyndsey wants Alan to make a commitment.

9. I scream when I pee

Alan's super-hot ex-wife (APRIL BOWLBY) wants him back.

10. One nut Johnson

Walden creates a new poorer identity to help him find love.

11. Give Santa a tail-hole

Walden juggles having two identities.

12. Welcome to Alancrest

Walden and Alan switch roles -- to help Kate's fashion line.

13. Grab a feather and get in line

Walden reveals the truth about his identity to Kate in song!

14. Run, Steven Staven! Run!

Alan refuses to give Lyndsey a key to the beach house!

15. Paint it, pierce it or plug it

Jake returns home with his older girlfriend (JAIME PRESSLY).

16. Advantage: fat, flying baby

Walden tries to win Kate back on Valentine's Day.

17. Throgwarten Middle School Mysteries

Walden meets his ex-wife at a high-end singles mixer.

18. The 9:04 from Pemberton

Alan moves in with Herb after a fight with Walden.

19. Big episode. Someone stole a spoon.

Walden and Alan cheer up Herb with a nonstop party.

20. Bazinga! That's from a TV show.

Jake cheats on his girlfriend... with her teenage daughter!

21. Another night with Neil Diamond

Alan's devastated after his breakup with Lyndsey!

22. My bodacious Vidalia

Alan gets a "breakover" (i.e. post-breakup makeover)!

23. Cows, prepare to be tipped

On the season finale, Walden dates a girl & her grandmother!