Barsoom

The Sixth Doctor had a map of Barsoom in a TARDIS storage room. One place was labelled Helium and the name John Carter was included in the caption. (COMIC: Changes)
== Behind the scenes ==
Barsoom was the name for Mars in the Martian Series of novels by Edgar Rice Burroughs. John Carter was the protagonist of the series and Helium was a major kingdom of Barsoom.
Category:Planets