Television & MoviesEdit
- Julie Andrews: One Step Into Spring on CBS, March 9
- Bob Hope's Birthday Special, May 29
- The Muppet Show Season 3 begins in syndication, September; ITV airings in the United Kingdom begin in November
- NBC Salutes the 25th Anniversary of the Wonderful World of Disney, September 13 and 17
- Sesame Street Season 10, November 27
- Christmas Eve on Sesame Street on PBS, December 3
- A Special Sesame Street Christmas on CBS, December 8
- The Muppet Movie begins filming in July.
- Taping for The Muppet Show scheduled for February 12 to May 15, October 1 to December 15 David Lazer Letter, December 16, 1977.
- The Count's Poem
- Ernie's Telephone Call
- The Exciting Adventures of Super Grover
- Grover's Own Alphabet
- Grover's Super Surprise Book
- The Muppet Show Book
- The Sesame Street Bedtime Storybook
- The Sesame Street Cookbook
- The Sesame Street Library (Volumes 1-12)
- Who Am I?
- The Muppet Show 2
- Sesame Street 10th Anniversary Album
- David, Daydreamin' on a Rainy Day
- Fair Is Fair
- On the Street Where We Live - Block Party!
- Sesame Street Fever
- Sesame Street Story Time
- Sing Sang Song Singalong
- John Tartaglia is born, February 16
- Don Sahlin dies, February 19
- Sam Pottle dies, July 4
- Michael K. Frith becomes Vice President of Henson Associates
- Kathryn Mullen and Steve Whitmire join The Muppet Show as Muppet performers
Muppet Character DebutsEdit
- Sesame Street: Bruno the Trashman, Barkley, Two-Headed Monster
- The Muppet Show: Lew Zealand, Beauregard, Annie Sue, Gladys, Louis Kazagger, Camilla, Bobby Benson
- Sesamstrasse: Samson, Tiffy, Finchen, Uli Von Bödefeld
- 1, Rue Sesame: Toccata, Mordicus, Trepido
- Toronto Santa Claus Parade features a Sesame Street float
- The live dog used for Foo Foo is born, December 13.