Episode 4521




 * Papa Bear learns that school rules are different from rules at home when he volunteers at Baby Bear’s preschool. (With a special guest appearance by Jane Krakowski.)


 * Seth Meyers and The Count explain what a "greeting" is.


 * Ed Sheeran and his furry friends sing about the "Two Different Worlds" we live in.


 * Grover makes sure no one disturbs Michelle Obama while she has her breakfast, but he quickly runs out of energy marching. She points out he needs a healthy breakfast to be healthy and have energy for the rest of the day. Grover heeds her advice and munches down some breakfast...hers.