Proof that her Emmy hasn’t gone to her head (or to her agent’s head), comic actress and “Glee” favorite Jane Lynch cameos on “iCarly” (7 p.m., today, Nickelodeon). “iCarly” is a live-action cartoon comedy about spunky ‘tweens who host a web show about their lives. Carly’s pal Sam has been complaining about her mother and her low-life ways for years. But no one has ever seen her — until tonight, when she appears in the person of Jane Lynch, who does not disappoint as a self-involved, tough-as-nails anti-role model.

• “Fairfield Road” (8 p.m., today, Hallmark) may not be on the map, but like every address in the Hallmark universe, it’s in a darn nice town. Like nearly every movie on the cable channel, “Fairfield” is about a city slicker who thinks he has life figured out, only to find solace in a less glamorous ZIP code. In a single day (make that an afternoon), brash Noah (Jesse Metcalf) discovers that his new job with a hotshot senator is a bust, and that his girlfriend and would-be fiancee has been unfaithful. Fate finds him traveling to a small town near Cape Cod to retrieve the engagement ring he bought for his faithless girlfriend. How is he to know that the town of Harpswell needs him almost as much as he needs Harpswell?

• John Walsh opens the 24th season of “America’s Most Wanted” (8 p.m., today, Fox) with a look at the 9/11 terror attack and a profile of some of the FBI’s most wanted terrorists, men who were responsible for mass murder.

It’s interesting to note that nine years after that attacks, some of the perpetrators are still at large. It’s also worth noting that we are still arguing over how we respond to these men and their vile deeds. Are we at “war” with vaguely defined terror, or is it a law-enforcement issue, where clearly specified suspects are pursued for specific criminal actions. Nine years later, much hinges on our answer to that question.

• Lady Gaga dominates the MTV Music Awards (8 p.m., Sunday, MTV) with 13 nominations. Eminem, who has been around these things before, has eight nods. And the fresh-faced Justin Bieber savors his first nomination.

The MTV Video Music Awards were an institution long before Justin Bieber, or even Lady Gaga, were born. The first award show took place in September 1984, back when Madonna’s “Like a Virgin” and Michael Jackson’s moonwalk were relatively new sensations. Herbie Hancock dominated the proceedings with his “Rockit” video. Hosts Dan Aykroyd and Bette Midler — fresh from the success of “Ghostbusters” and “Down and Out in Beverly Hills” — set a precedent with cheeky banter. Tonight’s host will be E! talk-show star Chelsea Handler, whose bawdy, lowest-common-denominator humor will be right at home here.

• A week after scoring Emmys for writing and Best Drama, “Mad Men” (9 p.m. Sunday, AMC) returned to form last Sunday with a strong episode about creative differences and collaboration between Don and Peggy and a reminder that their relationship remains at the center of the series, which has been moving a tad slowly of late.

The improvement could not have come at a better time, because I’m under the impression that “Mad Men” mania may be on the wane. At least among the chattering class of critics and media-obsessives who are the core of the small but devoted “Mad Men” audience.

Over its first three seasons, “Mad Men” reflected on grand historical events from the Nixon-Kennedy debates to the Cuban Missile Crisis to the Kennedy assassination. Next week, “Mad Men” may be affected by an event outside its writers’ control. I’m no soothsayer, but I predict that on the evening of Sept. 19, 2010, people will stop talking about “Mad Men” quite so much because they will be chattering about, exulting in and anticipating the next episode of “Boardwalk Empire” on HBO. Like “Mad Men,” its creative core features former “Sopranos” writers and directors. Look for a review in this space next weekend.

Today’s highlights

• A&E offers viewers 10 chances to catch “The Glades” (4 p.m. through 3 a.m., A&E).

• The Walt Disney Studio’s 1937 full-length musical cartoon “Snow White and the Seven Dwarfs” (7 p.m., Family) marked a revolution in big-screen animated entertainment.

• Mitchell learns a shocking secret about Lucy on “Being Human” (8 p.m., BBC America).

• The search for a mystical artifact runs into some stubborn root vegetables in the 2010 fantasy “Mandrake” (8 p.m., SyFy).

• Two Maine high schools vie for respect on and off the football field in the documentary “The Rivals” (8 p.m., Smithsonian).

• Peyton Manning hosts “Saturday Night Live” (10:30 p.m., NBC), featuring musical guest Carrie Underwood.

Sunday’s highlights

• A professor with his head in the stars ends up 6 feet under on the “Masterpiece Mystery” (8 p.m., PBS, check local listings) presentation of “Inspector Lewis: Dark Matter.”

• A faux living room gets a real entertainment center on “All American Handyman” (8 p.m., HGTV).

• The CIA calls on Miles and Tanya on “Rubicon” (8 p.m., AMC)

• Eric plots revenge on “True Blood” (8 p.m., HBO).

• Claire receives visitors on “The Gates” (9 p.m., ABC).

• Joan and Peggy must intervene after some office behavior gets out of hand on “Mad Men” (9 p.m.).

• Ray mulls a sabbatical on “Hung” (9 p.m., HBO).

• Ari’s wife explodes on “Entourage” (9:30 p.m., HBO).