Doug and the cadets learn about black holes as they’re faced with a very difficult decision – destroy the Norb so that The Doctor can’t get his hands on it, or keep it so that they can use the extra power against him? Find out in this week’s episode! (Duration: 30:12). Theme music by Kevin Macleod – Incompetech.com. Want to listen offline? Click the download icon on the player above to download this episode to your device.