|Plot||Letter "R" Mystery|
|Air date||November 11, 2011|
|Season||Season 42 (2011-2012)|
|Releases||M is for Mystery (altered)|
| ||What's the Word on the Street?: Compare|
| ||The camera pans from the Arbor to Hooper's Store where Chris serves a bowl of raisin raspberry ravioli to Detective Alfie Betts (Adam Rodriguez), who's on vacation from his duties. Elmo and Abby Cadabby pop into frame to welcome the viewer and walk over to meet Betts. The detective already recognizes who they are, listing off their names and characteristics, and explains that he investigates to find answers to problems.|
| ||Suddenly, a scream is heard. Telly runs to Detective Betts panicking that his robot and remote have gone missing. Leela comes by looking for her roses and rake that have disappeared from the garden. Elmo and Abby ask Betts to investigate, but he insists that he's on vacation. However, once Betts realizes his ravioli is gone as well, he's on the case. Elmo and Abby volunteer to be his "crackerjack team of detectives," with Abby poofing her and Elmo into formal detective suits. Still in his relax-wear, Betts goes off to change and starts the investigation by striking a detective-y pose.|
| ||Betts and the group deduce that all the missing items begin with the letter R, but why are they missing? Just then, the Amazing Mumford arrives fretting that his rabbit disappeared before he was able to pull off his magic trick. Since "rabbit" also begins with R, it's deemed to be part of the mystery. Mumford and Telly claim to have seen someone running away, so Betts draws out their description of the suspect, revealing to be the letter R!|
| ||Elmo, Abby and Detective Betts formulate a plan to bait the letter with something that starts with R. Elmo suggests using rigatoni. Once the trap is set, they hide behind the fruit stand at Hooper's Store and observe a letter nibbling the bowl of pasta. They compare him to the drawing to verify that it's the letter R, but just when they rush over to catch him, he quickly vanishes having eaten all of the rigatoni. The team determines that they need a heavier R item, so Abby and Elmo propose using a large rock from nearby. The letter R promptly carries the rock away, but the detectives are able to catch up and confront him. The letter R confesses to taking all the items because he loves R words. Feeling repentance, the letter R returns all of the items from his room.|
| || Telly, Leela and Mumford are reunited with their belongings. The letter R vows not to take anymore R items, stating that he's "rehabilitated." Detective Betts thanks Elmo and Abby for their hard work, and the letter R brings him his ravioli as he gets back to relaxing.|
The street story can be viewed on Sesamestreet.org.
| ||Amar'e Stoudemire and Carmelo Anthony compare their basketball skills with Grover.|
| ||Abby's Flying Fairy School is on the way, but first, Murray wishes to know the letter of the day. Ovejita provides him with a radio, rock and rabbit, all R words!|
| || R for Run: A montage of kids running.|
(First: Episode 4205)
| || Murray and a group of girls introduce Abby's Flying Fairy School.|
(First: Episode 4261)
| || Abby's Flying Fairy School|
The students are in the middle of music class, but the music they make isn't too great. Abby requests they just use magic to play their instruments, but Mrs. Sparklenose says practice is the right path. A flying boombox swoops in the window and they press "play," releasing Morty the Musical Muse (who speaks in rhyme). Before he can leave, they must pass his three challenges. With a wave of his baton, Abby's trombone flies out of control. In order to get down, she must change the pitch; by playing high notes, she goes higher, and playing low notes, she makes it back to the ground. Next, Gonnigan's maracas shake violently, quaking the entire school. To top them, he needs to change the tempo. He discovers that means fast and slow and is able to stop the shaking by moving them slowly. Finally, Blogg's drum starts bouncing on top of him and must change the dynamics of the music (how loud and soft). Blogg grabs the drum and plays it softly, sedating it. The students have learned many new things about music and Morty takes his leave. The kids decide to apply their knowledge and make music instead of snack time.
(First: Episode 4265)
| || Children dance to a succession of musical styles.|
(First: Episode 4130)
| ||Before Bert and Ernie's Great Adventures, Murray and Ovejita draw the lottery number of the day - the number 19.|
| || Counting to 19 using Indian imagery|
(First: Episode 4228)
| || Murray and the kids introduce Bert and Ernie's Great Adventures.|
(First: Episode 4187)
| || Bert and Ernie's Great Adventures|
Duck-Detectives Bert and Ernie are called upon by Veronica Lambshank to investigate the strange behaviors of her friend, Malty, who claims to be a "Maltese duck". Bert and Ernie disguise themselves as Veronica’s sheep cousins and meet them by the pond. Rubber Duckie suggests that they get Malty to swim, and then maybe he’ll quack. Ernie pushes Bert in the pond and Malty saves him, but he does not quack and flies off. Later, they follow him through the town and listen for him after loosing his. They also find Veronica has followed them. They hear whistling and follow the sound, leading to Malty’s house. He confesses to being a Black-Bellied Whistling Duck, and explains he pretended to be a Maltese duck so she would be his friend. They all celebrate by whistling.
(First: Episode 4187)
| ||"Elmo's World" is coming up, but first, Murray plays "Dare to Compare" with pairs of vegetables.|
| ||Ziggy the Zebra-saurus raps about shapes.|
| || Murray, Elijah and Jet-Lee introduce "Elmo's World."|
(First: Episode 4259)
| || Elmo's World: Eyes|
(First: Episode 4180)
| ||Murray announces the sponsors.|
| || ||On the DVD release M is for Mystery, the episode's opening and title card are omitted, and The Word of the Day segment is replaced with "The Closer." (First: Episode 4213)|
- This episode features the first appearance of The Amazing Mumford since episode 4108. This is also Jerry Nelson's last performance as Mumford before his death in 2012.
- An image of the Michael Bloomberg Muppet from the 2009 Annual Sesame Workshop Benefit Gala appears on Alfie's newspaper.
- The Season 43 re-airing of the episode features an additional sponsor tag: "The National Coalition of Resting People."
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|Episode 4269||Episode 4271|