Rogers enters wearing dark glasses, asking, "Do you know who I am?" He says that some children are upset when their parents wear something different. Then Rogers dons a wig, but he is still Rogers. Marilyn Barnett arrives, ready for a rare indoor exercise. Rogers shows her the sunglasses and the wig beforehand. Both sit down to do a stretching exercise. Then Barnett leads Rogers outside. She had brought two large balls for a similar exercise (holding the ball during the stretch). The final exercise works on the arms, as Rogers and Barnett give the ball a succession of little bounces. Bob Trow gives Barnett a portrait of her. They take the Barnett portrait to school.
In the NOM, the Trolley finds a disguised Lady Aberlin wearing a wig and sunglasses. She is about to visit Daniel when King Friday arrives. Being fooled by her disguise, Friday asks basic questions about the NOM, and she answers them all, including her full name: Lady Betty K. Aberlin. Robert Troll recognizes Lady Aberlin after just a few seconds. He shows her drawings of the package for Purple Panda that had been lost earlier in the week. When Lady Aberlin knocks on the Clock and identifies herself, Daniel is tearful because she is in disguise. She proves her true identity to Daniel, explaining she had her hair done in another neighborhood. Daniel shows Lady Aberlin a wood plaque bearing "143," which a friend made. It's not the house number on the Clock, but the numerical expression for "I Love You." Robert Troll tells Lady Aberlin the package may be in the P Room of the Castle. Lady Aberlin gives him the code "143" without explaining what it means. At the Castle, she says "143" to Queen Sara. They agree to go to the P Room.
Back at the television house, Rogers writes "143" in large numbers on a piece of paper. He explains that the Minots Ledge Lighthouse, south of Boston Harbor, flashes its light in a "143" pattern. Mr. McFeely arrives with a time-lapse video he made of the stagehands setting up the television house in the studios of WQED. After the screening, Rogers donates his "143" sign to Mr. McFeely.
Songs: Won't You Be My Neighbor?, I'm Still Myself Inside, I Like Someone, There Are Many Ways To Say "I Love You" (the "143" way), Speedy Delivery To You (second version), Good Feeling.