R is the 18th letter of the English alphabet. It first sponsored Sesame Street in Episode 0011, after sponsoring some of the test episodes.

Sketches about R

• The R Machine (Ernie and Bert)
• The Typewriter: R - Rope
• Harvey Kneeslapper tells the mailman that he has a letter for his mother... the letter R!

The Muppet Show

• In a running gag carried on through episode 115 of The Muppet Show, Fozzie claims to have a letter for Kermit the Frog. That letter turns out to be the letter R. Kermit tries to play the same joke on Scooter, who isn't so easily duped.