Nightynight! Big Bird is excited to sleep in his new pajamas but when Gordon tucks him in, he can't seem to get comfortable. There's something bothering Big Bird but he can't put his wing on it. This is a problem that only a sleep consultant can solve. As luck would have it, the Princess from the Princess and the Pea arrives to help diagnose the issue. Joel McHale meets with some "prickly" characters, in Abby's Flying Fairy School it's nap time, and in Elmo's World it's time to catch some z's.