Question: On the show 30 Rock, why are the characters Jenna and Tracy afraid of losing attention?
About the article "30 Rock", section "Season 4".

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Tracy Jordan (Tracy Morgan) is the loose-cannon star of "TGS."
He is a movie star with a reputation for erratic behavior.
This reputation is well-deserved; much of it is an intentional attempt on his part to maintain his "crazy" persona in the eyes of the media.
In the pilot episode, Jack Donaghy forces Liz Lemon to hire Tracy as the new star of her sketch comedy program "The Girlie Show."
To the chagrin of Liz and Jenna, Jack renames the show "TGS with Tracy Jordan" in the following episode.
Tracy has remained the star of "TGS" ever since. 
Liz becomes furious when Jack decides that Tracy should be the number one priority on "The Girlie Show".
Jenna fears that Tracy will begin to overshadow her, but Tracy is quite pleased with his new job on the show.
Liz and Jenna become more aggravated when Jack decides to change the name of "The Girlie Show" to "TGS with Tracy Jordan", without consulting either of them.
Jack has Tracy and Jenna appear in a promotion for the show, in which Tracy angers Jenna by forgetting her name and by not letting her speak.
After the promotion, Liz tries to re-assure Jenna by telling her that nobody on the show likes Tracy and that the only reason that he is on the show is because of Jack.
Liz finds out that Jenna's microphone was still on, and everyone in the studio heard her say terrible things about Jack and Tracy.
Liz attempts to make amends by talking to Tracy during a rehearsal, during which she makes negative remarks about Jenna and the other members of her staff.
Liz is notified by Kenneth Parcell (Jack McBrayer) that her chat with Tracy was aired over the studio's monitors, which meant that everyone heard and saw her making the comments.
Liz's staff show their displeasure by throwing food and other objects at her.
Liz and Tracy discuss an idea to get everyone together to try and smooth things over, and Tracy decides to invite Liz and the staff to a party aboard a yacht.
Tracy gets along well with everyone at the party, including Jenna, and things appear to be going very well.
Liz soon discovers that the yacht does not belong to Tracy, and the yacht's real owner shows up with the NYPD.
The following day Liz learns that Jack paid the newspapers to keep Tracy out of the press but left a photo of Jenna passing out on the yacht in their pages, which Jenna sees as exciting and flattering. 
"Mamma Mia" is the of the third season of the American television comedy series "30 Rock", and the 57th overall episode of the series.
It was written by co-executive producer Ron Weiner and directed by series producer Don Scardino.
The episode originally aired on the National Broadcasting Company (NBC) network in the United States on May 7, 2009.
Guest stars in this episode include Alan Alda, Steve Buscemi, Stuart Margolin, Keith Olbermann, Clayton Dean Smith, and Michael Benjamin Washington.
In the episode, Jack Donaghy (Alec Baldwin) begins to search for his biological father with help from Liz Lemon (Tina Fey).
Meanwhile, Tracy Jordan (Tracy Morgan) introduces his supposedly illegitimate son (Washington) to the cast and crew of the fictitious show "The Girlie Show with Tracy Jordan" ("TGS"), but some question his intentions.
At the same time, Jenna Maroney (Jane Krakowski) and Liz fight for attention when Jenna gets public recognition for a comedic sketch Liz wrote.
"Mamma Mia" has received generally positive reception from television critics.
According to the Nielsen Media Research, the episode was watched by 6.2 million households during its original broadcast.
Ron Weiner and Alan Alda received Primetime Emmy Award nominations for Outstanding Writing in a Comedy Series and Outstanding Guest Actor in a Comedy Series, respectively, both for this episode. 
"Idiots Are People Three!"
is the of the sixth season of the American television comedy series "30 Rock", and the 106th overall episode of the series.
It was directed by Beth McCarthy-Miller, and written by co-show runner and executive producer Robert Carlock.
The episode originally aired on the National Broadcasting Company (NBC) network in the United States on January 26, 2012.
Guest stars in this episode include Will Arnett, James Marsden, Kelsey Grammer, and Denise Richards.
In the episode, Jack Donaghy (Alec Baldwin) deals with the return of Devon Banks (Will Arnett) and Liz Lemon's (Tina Fey) relationship with Criss (James Marsden), Liz deals with Tracy Jordan (Tracy Morgan) and his protest for idiots, and Kenneth Parcell (Jack McBrayer), Jenna Maroney (Jane Krakowski), and Kelsey Grammer attempt to clean up after Kenneth and Jenna accidentally poison and knock out Pete Hornberger (Scott Adsit). 
Season 1.
Season one began airing in the United States on October 11, 2006, and featured 21 episodes.
The season finale aired on April 26, 2007.
Jack Donaghy, the "Head of East Coast Television and Microwave Oven Programming" at General Electric (GE), is transferred to work at the NBC headquarters, 30 Rockefeller Plaza, and retool the late night sketch comedy series "The Girlie Show".
The show's cast and crew are outraged by this; especially head writer Liz Lemon and main actress Jenna Maroney.
Jack proceeds to wreak havoc on "The Girlie Show", forcing Liz to hire off-the-wall movie star Tracy Jordan.
He again irates the cast and crew of "The Girlie Show" when he changes the name to "TGS with Tracy Jordan" (or just "TGS").
As the season progresses, the episodes become less about "TGS" and more about how the characters deal with juggling their lives and their jobs —specifically the protagonist, Liz Lemon, but other characters are also explored.
Episodes also become less self-contained and various story arcs develop in the second half of the season.
For example, the first major story arc centers on Liz's relationship with Dennis Duffy (Dean Winters), "The Beeper King."
Other story arcs include: Jenna promoting her movie "The Rural Juror"; Tracy going on the run from the Black Crusaders; Jack's engagement, which was eventually called off, to a Christie's auctioneer named Phoebe (Emily Mortimer); and another relationship of Liz's with Floyd (Jason Sudeikis).
Guest stars include Nathan Lane, Isabella Rossellini, Will Arnett, Wayne Brady, Elaine Stritch, Whoopi Goldberg, Conan O'Brien, LL Cool J, and Ghostface Killah.