The Doctor teaches Leo about the life cycle of a star.
Music Credits:
Intro: 1969 - Murray Gold
The Doctor's Special Brand of Nonsense: Minnie Hooper - Murray Gold
Cool Stuff (Cosmic): Life Among the Distant Stars - Murray Gold
Personal Business: Blink - Murray Gold
Cool Stuff (Grounded): A Noble Girl About Town - Murray Gold
Competitive Leisure: The Big Day - Murray Gold
