The Simpsons (8pm, Fox) - Jonah Hill lends voice to a legendary prankster from Springfield Elementary who at age 19, shows Bart that he hasn't outgrown his mischievous ways.

Did the Mob Kill JFK? (8pm, Discovery) - On the 46th anniversary of John F. Kennedy's assassination, Discovery has two specials looking at his death. First, an examination of evidence suggesting a mob connection to the shooting, and then at 9pm, "JFK: The Ruby Connection" looks at motives of Jack Ruby in his murder of Lee Harvey Oswald.

American Music Awards (8pm, ABC) - Performers include Black Eyed Peas, Lady Gaga, Eminem, Janet Jackson, Whitney Houston, Carrie Underwood, Jay-Z, and many more. Michael Jackson is posthumously nominated for five awards.

Curb Your Enthusiasm (9pm, HBO) - In the one-hour seventh season finale, Larry misses out on time with Cheryl to do a favor related to the "Seinfeld" reunion. 

The Oprah Effect (10pm, CNBC) - A look at how Oprah Winfrey can turn entrepreneurs into millionaires.

Fifty years ago today, ABC debuted the show featuring our favorite animated moose and squirrel, Rocky & Bullwinkle.

Or more formally, Rocket J. Squirrel and Bullwinkle J. Moose.

Remember?

Bullwinkle: Hey Rocky! Watch me pull a rabbit out of my hat.
Rocky: Again?

Duke Law student Andrew Blumberg showed off his "Simpsons" expertise on last night's "Food Network Challenge," and helped cake decorator BethAnn Goldberg earn the $10,000 grand prize.

Andrew, who was introduced on the show as being from Arlington, Texas (no Duke shout out!), was one of four Simpsons Super Fans chosen to compete along with serious cake decorators to craft the ultimate "Simpsons Mystery Cake."

Andrew and BethAnn were assigned a Bart Simpson cake, with instructions to play off the classic Simpsons episode, "Last Tap Dance in Springfield."

Second-year Duke Law student Andrew Blumberg will appear on the "Simpsons Mystery Cakes" episode of "Food Network Challenge" tonight at 8pm.

Blumberg earned a spot as one of the show's four Simpsons Superfans, and was paired with a professional cake designer to create a cake in the likeness of one of the show's main characters: Homer, Marge, Bart, or Lisa Simpson.

Is it the 20th anniversary of "The Simpsons" annual Halloween episode already?

While I've often not found the trio of shorts as funny as a typical episode, they are awfully fun, and this one keeps up the tradition.

It airs tonight at 8.

Playboy is having a lot of fun with their November issue featuring Marge Simpson on the cover.

Done to celebrate "The Simpsons" on its 20th anniversary, the issue is sure to be a collectors edition.

In a press release, Playboy found Hugh Hefner said this:

"Marge Simpson is the quintessential girl next door who stole our hearts 20 years ago and has held them captive ever since.

First we hear that Levi Johnston -- Sarah Palin's daughter baby daddy -- is taking it all off for Playgirl.

Now we hear the next character to go nekked will be Marge Simpson.

It seems the mother of three, who we'll admit keeps herself in pretty good shape, will be featured in a three-page pictorial, complete with an interview for the November issue. (There will still be a 3D Playmate too.)

Not sure how this will go over with feminist Lisa or what the guys at school will say to Bart, but we're pretty sure Homer will be happy.

And we're happy Homer is not going to take it off for Playgirl. Or, far worse, Mr. Burns. Ewww!

Amazing Race 15 (8pm, CBS) - Contestants begin their journey
tonight in Los Angeles, but soon find themselves in Tokyo trying to survive a Japanese game show. Lots of great teams this year, but one stands out for me: two Harlem Globetrotters.

The Simpsons (8pm, Fox) - It's season 21 for our favorite Springfield family, and tonight's debut was co-written by Seth Rogen.
Rogen also lends his voice to the trainer getting Homer ready for his super hero movie role. Look for lots of big name guest stars this season, such as Sarah Silverman and Anne Hathaway.

Cleveland Show (8:30, Fox) - A "Family Guy" spinoff from Seth McFarlane and Mike Henry about a divorced father who returns to his hometown and romances his first love, who now has children of her own. Fox also debuts "Family Man," and "American Dad" tonight.

Desperate Housewives (9pm, ABC) - A "beloved character" is
attacked in tonight's premiere, and much of season 6 will focus on solving the question of whodunnit. There's a mysterious new couple on the block, played by Drea de Matteo ("Sopranos") and Jeffrey Nordling ("24"). The show will also immediately reveal who was at the altar with Mike in last year's finale -- Susan or Katherine?

Dexter (9pm, Showtime)
- Season 4 opens with Dexter in full Family Man mode. He's married now with two stepchildren and a new baby. The only problem is he's still dicing up bad guys in his spare time. Keith Carradine returns as Agent Frank Lundy get Dexter's help in tracking a new serial killer called The Trinity Killer, because he kills in threes. A mind-blowingly creepy John Lithgow plays Trinity.

Californication (10pm, Showtime) - Hank is up to his old nasty tricks this season, and has expanded his tom-catting territory to academia.  

Cold Case (10pm, CBS) - For the seventh season debut, the team is investigating the 1966 murder of a young woman aboard a luxury ocean liner.

Brothers & Sisters (10pm, ABC) - Another season, another medical crisis for an unnamed member of the Walker family. Also, this season, Kitty and Robert try to save their marriage, and Sarah has a fling with "Dancing with the Stars" and "Sex in the City" French hottie Gilles Marini. And Nora and Holly will fight a lot, of course.

There's also some great stuff airing tonight in non-premiere news...

The Hollywood Reporter says The Simpsons are being immortalized on stamps by the U.S. Postal Service later this year.

The 44-cent first-class mail stamps, designed by Simpsons creator and executive producer Matt Groening, will feature Homer, Marge,
Bart, Lisa and Maggie Simpson.

There will be a sneak peek April 9, and the stamps will help celebrate the longest-running primetime comedy's 20th
anniversary this year.

And maybe, just maybe, it will help the shaky P.O. make some money.

TV comedy writer Ken Levine has figured out the real reason NBC is moving Jay Leno to primetime...