Season 40 (2009-2010)

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Sesame Street Season 40 will premiere in November 2009.

Season overview
The curriculum for Season 40 will focus on environmentalism and has been "designed to nurture young children's appreciation and love for nature." The Muppets of Sesame Street will encourage children to explore their curiosity in the outdoors with activities that teach simple, age-appropriate ways of showing care and stewardship for the environment.

According to Sesame Workshop, the popular segment "Elmo's World" will continue into the 40th season.

Episodes
Several episodes will focus on environmental issues - such as recycling or habitats. One episode will focus on Baby Bear and his family learning how to hibernate. . Another episode (#4210) will feature Big Bird learning about migration. .

Rocco Fiorentino, a blind sixth-grade jazz singer, will appear in an episode of the upcoming season; in the episode Fiorentino will explain to Elmo and Telly what it means to be blind. Another episode (#4208) deals with learning how to count by twos, fives, and tens.

Comedian/writer/producer Ricky Gervais is planned to appear in a segment alongside Elmo, singing a song he wrote expressly for the appearance. Comedian Jimmy Fallon will appear in two episodes of the season, and a parody of Mad Men was featured in talk at the fall 2009 TV Press Tour.

According to Joey Mazzarino, "We're trying to do what we call a hidden gem in every episode. That's for you guys, the fans. Little things like Biff and Sully in a scene, or some other stuff that I won't tell you about that will be hidden in the scene."

Guest stars

 * Kobe Bryant
 * Mariah Carey
 * Cameron Diaz
 * Jimmy Fallon
 * Rocco Fiorentino
 * Judah Friedlander
 * Ricky Gervais
 * Hugh Jackman
 * Jeff Gordon
 * Maggie Gyllenhaal
 * Lin-Manuel Miranda
 * Jason Mraz
 * Sarah Jessica Parker
 * Adam Sandler