Liz has trouble adjusting to being a stay-at-home mother. Jack takes stock of his life, and Tracy struggles to get on without Kenneth.

Jenna prepares an emotional farewell song as the cast and crew reunite for one final "TGS".

Jack's biological father's health hangs in the balance as the pair start to build a relationship. Liz draws some attention as a relationship expert, despite her own many failed relationships, after an appearance on a talk show. Tracy is invited to speak at his old high school and Kenneth helps him overcome some embarrassing memories from those years.

Kabletown chooses to stop funding live shows for TGS. While Liz and Jack embrace the change, Kenneth argues that live format should be kept intact, and he tries to convince the TGS staff to fight for their right to be live by taking them and our audience through a magical look back at the illustrious history of Studio 6H. The episode was filmed twice. The East Coast version aired for the Eastern, Central and Mountain time zones. The West Coast version was aired in the western, Alaskan and Hawaiian time zones.

Jack manages to convince a reluctant Liz to attend her high school reunion. Meanwhile, Don Geiss awakens from his coma and shocks Jack with a declaration of who he wants to be the CEO of GE. A shaken Jack decides he needs to get away and blow off some steam, but tags along with Liz to her reunion instead due to bad weather.

Liz tries to begin a relationship with a new tenant after accidentally receiving his mail. Meanwhile, Jack's appearance causes Elisa's grandmother to disapprove of the relationship, and Tracy has trouble maintaining the lifestyles of Wall Street frat boys.

Liz schedules a root canal to avoid feeling lonely on Valentine's Day; Jack woos an attractive and successful TV host; Jenna's stalker loses interest.

Liz questions fate when she meets the man of her dreams, while Jack's love triangle between high school love, Nancy Donovan, and CNBC anchor, Avery Jessup, comes to a head. Meanwhile, Jenna's boyfriend is confronted with a similar dilemma when his desire for another woman threatens to ruin their relationship, and Kenneth, with the help of Tracy, tries to avoid a promotion that would land him in LA.

On show night, Liz Lemon grows increasingly infuriated when no one seems to remember that it's her 40th birthday. Just before the taping, Tracy Jordan becomes convinced that nothing is funnier than a performer laughing and breaking character, which he elects to do all night, much to Jenna Maroney's chagrin. Meanwhile, Jack Donaghy struggles with the consequences of his promise to give up drinking while Avery is pregnant. The episode was filmed twice. The East Coast version aired for the Eastern, Central and Mountain time zones. The West Coast version was aired in the western, Alaskan and Hawaiian time zones.

Liz wonders if she's actually on a date with Jack as she accompanies him to a birthday celebration for a foreign prince. While at the ball, Liz sees a different side to Jack as he unexpectedly runs in to his ex-wife. Back at 30 Rock, Tracy tempts Pete with a booze- and babe-filled party in the office, while Kenneth tries to keep Pete on the straight and narrow.

Liz heads to Chicago to get out of jury duty and on her flight back to New York she is assigned a seat next to Oprah. Liz seizes the opportunity to ask Oprah for advice with some of the problems she's been having. Back in New York, the feud continues between Tracy and Jenna, and Jack's morals are tested by Kenneth after an Olympics snafu.

While Jack puts together the perfect 50th birthday party for himself, home videos inspire him to try to recreate his happiest moment. Dennis decides to tell Liz about his addiction. Meanwhile, Kenneth and Pete work to make Tracy's childhood dream come true.

With their show targeted for cancellation, the "TGS" crew desperately scramble to mount a top-notch production for their 100th episode. Meanwhile, Jack reconsiders a vital decision in his life, and Jenna mulls over motherhood.

Fed up with New York City after being mugged, Jack sets out to protect the safety of the city's elite by announcing his run for mayor. Meanwhile, Liz revels in sacrificing the good of the city to look out for her own interests, and Jenna and Paul are thrilled by the perversion of acting like a normal couple.

Jack sees an opportunity for budget cuts when Josh's contract is up, forcing Liz to go out of her way to motivate Josh into staying with TGS and not moving on to a rival show. Meanwhile, Kenneth earns a coveted spot in Tracy's entourage and Jenna gets in trouble over a misquote in Maxim.

When someone on the 'TGS with Tracy Jordan' staff insults Jack in a newspaper article about the season finale of 'MILF Island', he frantically sends Jonathan to interrogate everyone on 'TGS' until the culprit is found.

When Don decides to promote Jack and make him his successor over Devon, Jack decides to give his old job to Liz because she always has his back. However, a turn of events concerning Don's health compromises Jack's promotion. Meanwhile, Tracy thinks that his son is embarrassed of his career because he did not invite him to fathers day at school.

In the second season finale, Jack moves on to a new job involving politics in Washington, but the position is not quite what he anticipated. Meanwhile, Liz suffers a pregnancy scare, Kenneth confronts rival page Donny when applying for a summer job, and Tracy works on his latest invention.

Following a wild New Year's Eve, Jack has to try to repair the damage he did after leaving a drunken message on an ex's voicemail. Meanwhile, Jenna tries to get into a relationship with James Franco in order to cover up his secret; and Liz, after accidentally "outing" her cousin to his family, welcomes him to New York City; and Tracy finds new respect for women.

A reality TV series trails Tracy, which Liz tries to exploit for her own gain. Jack does his own exploiting: He attempts to make a fast buck off natural-disaster telethons. And Lutz sets out to increase his worth in the event of an apocalypse.

Jack and a very pregnant Avery take a romantic break in Canada. When Avery goes into labor, the power couple desperately scramble to not give birth to a Canadian. Meanwhile, Liz's getaway with Carol gets grounded, literally, when their plane collects dust on the tarmac. And Tracy is an EGOT winner, but with that comes overwhelming demands.

Jack asks Devin Banks to help him discredit Kaylie Hooper, Jack's teenage nemesis and KableTown's future CEO. Liz considers her options as she tries to become a mother. Tracy directs Octavia Spencer in his movie.

As her new kids arrive, Liz scrambles to save TGS from cancellation. Jack finds a new NBC president.

Jack bumps Jenna's scheduled appearance on 'Late Night with Conan O'Brien' by booking new star Tracy. Jenna, still irate over watching the show change to "TGS with Tracy Jordan," lashes out at Liz. To make matters worse, Tracy's gone off his medication and he's about to go on national television.

As the cast and crew of TGS with Tracy Jordan returns for a new season, Liz is excited to see Jack again. However, her excitement quickly fades as Jack insists that Liz is still not over Floyd. Meanwhile, Jerry Seinfeld shows up at Jack's office in an upset mood after Jack announces his newest plan. Finally, Kenneth becomes Tracy's office wife when Tracy separates from his wife and Jenna returns to set a whole lot heavier now that she has been involved in Mystic Pizza: The Musical!.