There's a new Muppet On the block! It is Abby's first day on the street. Can everyon's favorite fairy-in-training overcome her shyness and make new friends? Also in this episode: Law & Order: Special Letters Unit and a performance by John Legend with Hoots the Owl. Special guest Kristin Chenoweth stops by Elmo's World. This episode is brought to you by the letter M and the number 4.

Abby goes to the Storybook Community School for the first time, and Mrs. Goose and her class make her feel welcome. But when it's time for Show and Tell, she doesn't have anything to share, so she decides to use her magic wand to leave school and ask Elmo for help.

Cookie Monster asks Bob and a baby how they eat cookies, then counts cookies and does subtraction problems with them. After Zoe does an amazing cookie dance, Cookie Monster decides to go right to the source and talk to a cookie about cookies.

Gabi and Miles reminisce about their first day of school, telling Elmo about their classroom, the things they did, and how a disagreement over who got to play with a fire truck taught them about sharing.

Herb, the plant-eating dinosaur—the only dinosaur left, except, of course, for his cousin Shirley—pays a visit to Sesame Street. He meets many interesting new people; learns about healthy salads from Alan, about taking turns from Zoe and Rosita, and about the alphabet from Big Bird and Elmo; and even gets to play with a worm.

Snow White (Amy Sedaris) visits Sesame Street with her dwarves. One by one, each dwarf leaves the group, and soon Snow White ends up with ZERO dwarves. Can Elmo save the day for Snow White? Also in this episode: Bert and Ernie sing about circles and Grover learns how to ride a bike. This episode is brought to you by the letter O and the number 7

Luis and Maria are trying to celebrate their wedding anniversary with a private picnic, but they keep getting interrupted by songs, games, and dances about the letter "H.

Alan sets up a pretend school at Hooper's Store. As his star "pupil," Elmo gets to draw a picture, listen to Mr. Alan read a book, and sing the alphabet song.

Elmo celebrates the letter "J" by changing his name to Jelmo and jumping all over the neighborhood. During his travels, he sees Maria fixing things that begin with "J" and listens to Big Bird telling the story of Mary and her little lamb.

On the "Ask Oscar!" show, Telly reads a letter from a boy who can't remember what the little round things that hold his jacket together are called. Telly is ready to get the answer from Oscar, but Oscar isn't ready to tell.

All the adults are too busy running errands to play with Big Bird, so he finds himself wishing for them to be just like the kids. To his surprise, his Fairy Godperson appears and grants him his wish.

Baby Bear and Elmo write a thrilling story about the Three Bears in which they are Astro Bears trying to find the answer to the question, "How does porridge taste in space?"

"Teacher" Zoe arranges a field trip for Rocco and all her dolls, but there's no room on the bus for Telly's doll, Freddy. So Telly and Baby Bear give Freddy a day all his own, including a new game called Fantastic Freddy.

Prairie Dawn and the gang put on a Healthy Food Pageant. Zoe sings about potatoes, and Rosita sings about tortillas.

On a very busy day at Hooper's store, Baby Bear decides to create an automatic lemonade-pouring machine to help Miles out. He draws up the plans for his invention and then recruits Telly and Elmo to help build it.

When Slimey says that he wants to be a hero just like Trash Gordon, Rosita and Elmo are doubtful because they think heroes are supposed to be big and strong. But Oscar reassures him that he can do it, and Slimey takes on the mission of saving the letter of the day.

Host David Letterguy and The Alphabet Road Show are coming to Sesame Street to look for unusual people saying the alphabet in unusual ways. Telly and Baby Bear know exactly how they are going to say the alphabet, but Elmo is still unsure.

Zoe is throwing a birthday party for her pet rock, Rocco, and everyone's invited.

Oscar gets a new dog: a Rottendoodle named Cranky. Because he has heard that Rottendoodles are grouches that never do what you tell them to, never help anyone, and never kiss, he is astonished when Cranky starts doing all those things.

After hearing the story of Rapunzel, Zoe wishes to have long hair just like hers.

Elmo plays the What Comes Next Game, in which he must guess what comes next in a pattern before a mouse rings a bell.

Gina flies off to Guatemala to pick up Marco, the baby she is adopting. Maria goes with her to help her with her Spanish.

Gina brings her new baby home and discovers that everyone has been busy gathering blankets and diapers, making mobiles, and putting together the crib. All her friends want to continue helping, but what Gina and Marco really need is some rest.

Snuffy and Big Bird want to play with Marco, so they bring over a wagon filled with baseball equipment, rollerskates, a pogo stick, and checkers. Gina tells them the baby is too young to play with any of those things and suggests that they think like babies to come up with games everyone can play together.

Telly reports on National Try a New Food Day, starting with Baby Bear's attempt to eat some porridge with fresh fruit on top instead of brown sugar and honey.