Fireball XL5

Fireball XL5 was among the things the Eleventh Doctor associated with the "swinging sixties". (AUDIO: Hunters of Earth) Frobisher once sang its theme song to annoy Professor Strut, a hater of music. (COMIC: The Gift) "I wish I was a spaceman, the fastest guy alive! I'd fly around the universe in Fireball XL5."

- A line of the song.