Charlotte Rae

Norah Jones sings about the letter 'Y' with Elmo.

Telly Monster and Baby Bear are reporting on Sesame Street’s Fairy Tale Science Fair, where fairy tale characters solve their problems using science. Also in this episode: Samantha Harris and Elmo explain the word “reporter,” and Ernie sings his Daytime Emmy-nominated song, “I Wonder.” Brought to you by the letter W and the number 18.

After Big Bird’s dust bath, it seems that Snuffy is allergic to his best friend! Will Snuffy and Big Bird ever be able to play together again? Also in this episode: Taye Diggs and Idina Menzel try to explain the word “allergic,” but their animal assistants keep making them sneeze. Brought to you by the letter K and the number 10.

Rosita, Telly, and Elmo are waiting for the Itsy Bitsy Spider to climb up the water spout, but the spider is missing! Can the friends track down their arachnid among all the insects in the garden? Also in this episode: The Big Bang Theory’s Jim Parsons explains the word “arachnid.” Brought to you by the letter N and the number 8.

Bert is searching for the rare blue-bar pigeon, the only pigeon he’s never seen. Can Elmo and Abby help him find this elusive feathered friend? Also in this episode: Modern Family’s Julie Bowen introduces the word “binoculars.” Brought to you by the letter P and the number 12.

Leela, Telly and Elmo are folding clothes in the Laundromat when Inspector 4, Judah Friedlander, comes along to inspect for things that are in groups of four. Inspector 4 can't find four of anything and threatens to shut down the Laundromat! Luckily, Elmo suggests counting the bottles of fabric softener. Time to count! 1,2,3,4! There are four bottles of fabric softener. They pass the number 4 inspection! Next, Inspector 4 visits Mr. Hooper's store. Inspector 4 inspects the peanut butter sandwiches. Oh no! There are ten sandwiches and ten is more than four. Telly gets an idea! What if he eats some of the peanut butter sandwiches? Telly eats one sandwich, then two, and then three more sandwiches so that only four sandwiches remain. Hooper's store passes the number 4 inspection! Last, Inspector 4 looks around the steps of Sesame Street and sees the letter R" standing next to a rake. The Inspector 4 threatens to shut down the letter "R" because he only has one thing that begins with the letter "R," rake. Elmo has an idea! What if they find three other things that begin with the letter "R" and add them together? Elmo, Telly and the letter "R" find a Rose, a Rock, and a Rodent. They did it! They found four things that begin with the letter "R"! Inspector 4's mission is completed!

Crews and Reese begin their investigation and discover the victim was running an elaborate construction scam that left his clients without roofs or money. Also available on NBC, Netflix and Amazon Instant Video

Familias conversan acerca de cómo prepararse para el despliegue militar.

Alan needs someone to watch Hooper’s Store while he’s away on vacation. He interviews some unusual candidates, but none of them seem quite right. What’s he going to do? Also in this episode: Hoots the Owl sings a song, and Global Grover travels to Malaysia, where he learns how to make a kite. Brought to you by the letter D and the number 17.

Goldilocks pays a visit to the Street—and that spells trouble for the Bear family! She’s got her eye on some porridge, so Baby Bear will have to think fast to rewrite the ending to this familiar story. Also in this episode: American Idol’s Reuben Studdard and Elmo sing “The Alphabet Song,” and Ernie sings “Do De Rubber Duck.” Brought to you by the letter J and the number 9.

Snuffy is still invisible after breaking his magic ukulele. Can Maria and Big Bird solve his problem, or has everyone seen the last of Snuffy? Also in this episode: Bert reads a book about air while Ernie blows him away with a windy experiment. Global Grover visits Australia and makes some new animal friends. Brought to you by the letter O and the number 14.

When two kids make fun of Rosita’s Mexican accent, she decides that she’ll never speak again. Can Rosita learn to be proud of her voice, or will she be silent forever? Also in this episode: Norah Jones sings “Don’t Know Y” with Elmo. Ernie and Elmo sing the classic song, “Sing After Me.” Brought to you by the letter Y and the number 7.