Liz befriends a pregnant teenager from a donut shop she visits in the hopes to adopt her baby. Kenneth plans a combined birthday party for Tracy and Jenna, but Jenna wants all of the attention and a party of her own. Jack agrees to go out and party with Frank to keep his mind off of his absent girlfriend and ends up bonding with him over their parental issues.

30 Rock is left in shambles by the cast and crew after Liz is called away for jury duty. Meanwhile, Jack fails to listen to everyone when he becomes obsessed with launching a new big-money product.

Liz gives attention to her building relationship with Drew, and discovers that he has been granted special treatment in life due to his pleasing appearance. Meanwhile, Jack goes all out to re-sign Tracy now that his contract has expired. And Jenna's latest ploy to attract attention is to change her hairstyle.

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.

Despite the 50th episode of TGS airing, everyone is preoccupied with news of budget cuts. Jack has to dole out cutbacks while Kenneth has to take on extra duties. Meanwhile, Liz tries to save her staff and crew and Jenna and Tracy try to uncover Kenneth's secret.

Jack goes shopping for an engagement ring, for Elisa, with Liz. Elisa tells Liz a secret, and a prank results in an injury back at TGS.

When Liz reprimands Tracy in front of the TGS staff, Tracy asks Liz to stop giving him preferential treatment. Liz agrees, but Tracy thinks that Liz should give up some of her privileges also. Jack remembers some unpleasant memories of his father after his mother, Colleen, visits. Jenna adopts a pet gibbon.

Liz and Tracy encourage Jack to search for his real father. Tracy meets his new found illegitimate son, but Liz and Pete question the son's intentions. Jenna takes the credit for one of Liz's ideas.

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.

Jack demands changes to make TGS both more relatable to average Americans and more cost-conscious and sends Liz and Pete to search for fresh blood. Kenneth organizes a strike by the pages.

When Liz's apartment building is converted to condos she has to make a drastic change to her living arrangements. Meanwhile, Jack and Tracy reevaluate their plans for parenthood and Kenneth is on a mission to make "TGS" greener during NBC's annual "Green Week."

Jack’s interest in a new social networking site unexpectedly reconnects him with a high school crush. Kenneth tries to organize a Secret Santa Fun Swap, but not without resistance from some of the staff members. Meanwhile, Liz battles the task of buying a gift that’s good enough for Jack, and Jenna is horrified at the prospect of sharing her annual Christmas solo.

Jack tries to squash the burgeoning relationship between Liz and Danny. Tracy asks Sue to be in his entourage. Jenna tries out for Gossip Girl.

Liz searches for a man she met in her dentist's waiting room. Jack fears for the future when he learns a cable company may have its sights on NBC. Jenna helps Tracy try to get a Tony award.

Liz discovers that the TGS staff have been excluding her from their weekly hangouts, and strives to prove that she can be fun. Jack must choose between janitors and the shift time they both want, and Kenneth aids Tracy Jordan in being a good husband.

Wedding fever hits TGS, leaving Liz to sort out Grizz's dilemma when both Tracy and Dot Com want to be his best man. Jenna's new boyfriend, Paul, raises Liz and Pete's suspicions, while Jack is finally forced to deal with the death of his mentor, Don Geiss, when Geiss leaves him a strange but meaningful inheritance.

Liz Lemon meets her mother's old flame, while Jack Donaghy's mother, Colleen, gets tangled in his relationships with Avery Jessup and high school love, Nancy Donovan. Jenna's mother, Verna returns, while Tracy learns a lesson from his "mom".

Jack rocks the vote, manipulating a congressional election to help a particular candidate, thereby leveraging advantage for the network. Meanwhile, a perfect pair of new jeans gives Liz confidence; Tracy organizes a Golden Globe event with Jenna's help.

Jack recommends that Liz start seeing a therapist when she worries that Carol is getting bored with their relationship. In an attempt to take Jack's advice, Liz begins talking to Kenneth about her problems. Jack also finds himself caught up in one of Tracy's schemes when Tracy tries to convince him to invest in his son's theme restaurant in Times Square. Meanwhile, Jenna and Paul celebrate their six month anniversary.

Chaos builds when bigwig Hank Hooper marks "TGS" for cancellation, yet Jack persuades him to let the staffers stage the show's 100th episode.

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.

Liz tries to turn her personal life from drab to fab by revamping her dream apartment. Meanwhile, Avery is held hostage, and Tracy discovers that Kenneth, Dot Com and Grizz have forged a solid bond while he was away.

In order to hide his relationship with Lynn, Frank convinces his mother that he is dating Liz. Tracy and Jenna team up to try to solve the case of Pete's missing whisky. Meanwhile, Jack teaches Kenneth how to take down his first business nemesis.