The longest running comedy in TV history is celebrating its 20th year with on on-air scavanger hunt.

The Fox network is paying “homarge” to “The Simpsons” with the network’s first-ever on-air scavenger hunt beginning Monday and continuing through Nov. 13.

Fans can watch Fox each night to find “Simpsons” shout-outs, tributes and clues featured in primetime programming and on-air promos.

One lucky winner will receive a trip for two to Los Angeles to attend a “Simpsons” table read with the Emmy Award-winning voice cast and producers, a home entertainment system, “Simpsons” DVDs and merchandise, and tickets to Universal Studios Hollywood, home of The Simpsons Ride.

Viewers 13 years of age and older who spot shout-outs can log on to http://www.fox.com/scavengerhunt each night to test their knowledge for an opportunity to unlock daily downloadable extras and to enter to win the grand prize. The deadline for submissions is 2 p.m. Nov. 14. For complete official rules, guidelines and more information, visit http://www.fox.com/scavengerhunt.

“Best. 20 Years. Ever.,” a year-long global celebration launched in January, will culminate in January 2010, the 20th anniversary of the series’ debut.