Episode 0131

Big Bird teaches the kids that "Everyone Makes Mistakes" in the season 2 premiere. Grover, Herry Monster, Guy Smiley and Sherlock Hemlock are introduced in this episode, and Farley can be glimpsed when Cookie Monster eats Big Bird's J. The Buddy and Jim segments are replaced with new segments featuring Larry and Phyllis.

Muppeteers Jerry Nelson and Fran Brill joined the Sesame Street cast in the second season. In this episode, Nelson performs Granny Grouch, Herry Monster, Sherlock Hemlock and Bennett Snerf; Brill performs Arlene Frantic.

Cast

 * Matt Robinson - Gordon
 * Loretta Long - Susan
 * Bob McGrath - Bob
 * Will Lee - Mr. Hooper
 * Caroll Spinney - Big Bird, Oscar
 * Frank Oz - Cookie Monster, Bert, Grover, little boy
 * Jerry Nelson - Granny Grouch, Herry Monster, Sherlock Hemlock, Bennett Snerf
 * Fran Brill - Arlene Frantic
 * Jim Henson - Ernie, Guy Smiley, Mr. Nose
 * Alan Arkin - Larry
 * Barbara Dana - Phyllis
 * Arte Johnson - soldier
 * Bill Cosby - twins
 * Carol Burnett