Pete gets an internship thanks to Ashley but gets fired when he's caught having sex with the boss' daughter, Ashley's sister.

Pete, Berg and Sharon get invited to the wedding of one of Pete's ex-girlfriends. Pete wants to reveal to the groom that she's only marrying him because she wants to get married, but he doesn't. Ashley finally reveals her true feelings for Berg but she tells him that she has a boyfriend at Oxford.

Pete gets a new extremely peppy best friend, Sharon sets Berg up with Sean so she'll stop seeing Johnny but Sean is secretly in love with Johnny which leads Sharon and Johnny to break up. Sharon and Pete share a passionate kiss at the end of the episode.

When Johnny tells Pete and Berg that he wants to marry Sharon Pete feels his time to tell Sharon how he really feels about her is running out. Johnny proposes but Sharon just runs out.

Berg and Irene race to bury any proof of their fling, while Johnny gives Sharon a post-wedding shock and Pete realizes that, for a firefighter, Marti is a cold, cold girlfriend.

Berg lands in a very tight spot when Irene takes their little affair a tad too far; Sharon refuses to get dirty with Johnny until he cleans up the new brownstone; and Ash begins to fall apart after her breakup with Nomar.

Boston turns against Ashley after Pete leaks her link to Nomar's rumored exit from the Red Sox; Berg begs Johnny to keep his secret fling with Irene under wraps when Sharon comes sniffing for the scoop.

Pete must face his feelings for Berg's mom after her fling with his fire captain goes up in flames. Meanwhile, a hot stock tip from Ashley has Johnny burning through his savings to strike it rich.

Berg's fling with Irene and Pete's secret thing with Susan all come out during a party to honor one of their lusty ladies. Meanwhile, Johnny hides his money matters from Sharon.

A client's philandering hubby has Sharon fearing for her own man's fidelity; Berg faces temptation at the hands of a comic-book artist who has fond memories of him from high school.

Irene sinks Berg's attempt to win her back by attending his work party on a yacht, where her dress gets more attention than he does. Meanwhile, Ashley ropes Pete into being her date in hopes of scoring a major fellowship she thinks Berg is going after.

When Sharon is late she thinks she may be pregnant so she makes Ashley take a pregnancy test with her, Berg tries to get a urine sample from Irene because he thinks she may be pregnant too when he finds out the glow in the dark condom they used was defective.

Berg gets suspicious of Pete when he always want's to deliver the pizza to 845 Arlington. So Berg makes the delivery for a change and discovers that it's a gorgeous artist who paints with her nude body that's been making the orders. This leads Berg and Sharon to believe that Pete is cheating on Melissa with her.

Berg realizes that he once spent the night with Pete's new love--and she also may have his name tattooed on her derriere.

Pete and Berg unwittingly buy fake tickets for luxury-box seats at the homecoming game when they try to one-up two former nerds who are now successful.

When Berg finds out that Ashley went to visit her boyfriend at Oxford he flies all the way to England to be with her. It turns out it is Oxford, Mississippi. Ashley's boyfriend says he'll move to Boston so they can stay together. Pete and Johnny get jobs as limo drivers. Berg and Ashley finally kiss.

Pete enlists the help of a TV love guru to help Berg and Ashley when Berg calls Ashley to tell her that he thinks they shouldn't see each other anymore. She doesn't take very well and breaks down and cries. And for Sharon and Johnny because Sharon is jealous of Johnny's friend Sean when she finds that Sean is a woman.

Sharon goes for a new job to impress her dad, but during a background check, her alma mater reports she never graduated due to tickets she thought the guys had paid.

Berg is suspicious that Ashley might be posing nude for a professor. Johnny's four sisters and three of them are pregnant. Berg delivers a baby.

Germ feeds Sharon a batch of bad advice about how to get Johnny to fix the home in a more timely manner. Meanwhile, Pete has Marti burning mad when he bugs her about their romance during a rescue.

Berg decides to keep hiding his secret fling with Irene after she blows him off for a last-minute dinner date with Pete. And at the next table over, Johnny blows his lid because Sharon has been spending too much time with Ashley.

Ashley's leaky plumbing has Berg in search of sleep, Pete in hot water with Irene, and Johnny in talks with Sharon to maybe have a baby.

Johnny and Sharon are overjoyed when their fire trap of a house goes up in flames, until Pete gets a hot tip that the place was torched. Meanwhile, Berg has a hard time watching his newly single mom have some truly single fun with Ashley.

Fate catches Berg unaware when he runs into a young woman who's not like the girl he knew in high school. Meanwhile, Sharon enlists Johnny to escort her to a business affair, and Ashley and Pete find themselves together---and enjoying each other's company.

A near death experience with a runaway fire truck has Pete reevaluating his life--and his loopy love affair with Ashley. Meanwhile, Berg seeks out an old flame to help get over Irene, but finds that she's even crazier than his beloved "cat lady."