Obsazení a štáb Learning About Letters
Caroll SpinneyBig Bird/Oscar the Grouch (voice) Martin P. RobinsonSnuffy/Telly Monster/Buster the Horse/Irvine the Grouch (voice) Pam ArcieroDentist (voice) Emilio DelgadoLuis Rodriguez Jim HensonErnie/Kermit the Frog/King Peter the Persnickety (voice) Jerry NelsonMr. Johnson/Herry Monster/Townsperson (voice) Frank OzCookie Monster/Bert/Grover/Princess Penelope (voice) 
