Intro summary: A Wise Old Owl conjures up a Magic Mirror for Greg and his friends Pat and Emily, who use it as a portal to jump back in time, in order to change situations where they have misbehaved. In this way, they learn meaningful lessons and morals, and Greg becomes a "good" boy.
-- In this episode, Greg is afraid to fall asleep and he stays up well past his bed time. So the Owl comes and teaches him the importance of sleep. With the help of his Magic Mirror, he makes Greg go back in time, so that he can be well rested for the next day.
Lyrics: Twinkle twinkle little star
"Twinkle, twinkle, little star
How I wonder what you are
Up above the world so high
Like a diamond in the sky
Twinkle, twinkle little star
How I wonder what you are"