Charlie’s ghost pays a visit to Alan after he suffers a minor heart attack.

Walden hits it off with a British babe, but neither of them is sure he’s ready to re-enter the dating world.

Walden is trying his best to impress his new love interest when Bridget reappears in his life.

Walden’s mother arrives and Alan is smitten with her, even as she reveals a secret about Walden’s past that sends him into a downward spiral.

Walden’s ex-wife and mother try to take control of his company, so he turns to Alan for help.

Zoey tries to convince Walden to cut his hair and shave; Alan and Lyndsey revive their relationship.

Walden tries to loosen Zooey up by sharing some of Berta’s special brownies.

Strained relationships and girl-fighting result when a huge storm traps Walden, Alan, Zoey and Lyndsey in the house on Valentine’s Day.

Walden and Zoey’s relationship suffers after they share a near-death experience. Meanwhile, Alan wonders if Lyndsey has a drinking problem.

Walden deals with his ex-wife, Bridget.

Alan prepares Walden for a date with Bridget, while Jake decides to emulate Walden and drop out of school.

Walden goes looking for Mrs. Right while Alan has an opportunity to reconcile with Lyndsey.

Alan has trouble accepting Lyndsey’s seedy movie past, and Walden tries to cheer him up by throwing a party.

Walden receives divorce papers from Bridget, but forgets his depression when he meets a girl who looks eerily like her.

Jake has a crush on his chemistry tutor, who has a crush on Walden. Meanwhile, Alan obsesses over the journal his brother left him in his will.

When Walden begins redecorating the beach house, Alan becomes overly emotional.

Upon his release from the hospital, Alan is met with a slew of challenges that test his ability to cope.

Alan and Jake meet Walden Schmidt, a broken-hearted billionaire.

Charlie and Alan try to set up Evelyn with Russell the pharmacist.

When Berta takes a couple of days off, Charlie falls for her replacement. Meanwhile, Alan believes he’s being stalked by Lyndsey’s ex-husband.

When Charlie’s ex-girlfriend Courtney is released from prison, he treats her to the good life despite her having been in prison for conning him.

Alan goes to great lengths to be able to get Lyndsey a nice birthday present.

Depressed after his breakup from Courtney (Jenny McCarthy), Charlie goes to see his psychiatrist (Jane Lynch).

Berta discovers that Alan has been dating her daughter Naomi.

Alan feels paranoid when Lyndsey becomes friendly with Charlie.

Obsessed and believing her to be married, Charlie starts stalking Rose. Jake and Eldridge start taping themselves doing Jackass-style stunts.

While Charlie and Rose carry on their “affair,” Alan’s chiropractic business turns into a Ponzi scheme.

Rose is moving to London, and Charlie is surprised by his reaction to the news. Alan lies to a woman he met online.

Rose and Alan discover each other’s secrets. Meanwhile, Charlie’s desperate to get some time alone with Rose.

Lyndsey and Eldridge move into Charlie’s house after their home burns down.

Alan pretends to be Charlie when he goes out on the town; Charlie sneaks off for cosmetic surgery.

Charlie has difficulty dealing with dating a slightly older woman.

Charlie’s girlfriend gets fed up with his stalker, Rose.

When Jake finds out that Alan has been dating Eldridge’s mom, he packs up and heads to Judith and Herb’s. Meanwhile, Charlie decides it’s time to cut back on boozing.

Walden plans a big surprise for Zoey’s birthday.

Charlie is willing to do anything for Alan to accept Lyndsey’s offer to move in with her.

Zoey and Walden break up, causing Walden to experience a breakdown.

After moving in with Lyndsey, Alan continues to have a rendezvous with Melissa at Charlie’s house.

Alan and Lyndsey decide to spice things up in the bedroom.

Charlie is visited by the ghosts of his ex-girlfriends while Alan and Jake are on a road trip.