Polarfrey
From Tardis Wiki, the free Doctor Who reference
Polarfrey was a gas giant. Along with fiery red Karn and Kasterborous the Fibster, it was part of the same system as Gallifrey. (PROSE: Lungbarrow)
In another timeline, Lord Prydon mentioned the neighbouring planets Karn, Tersurus and "distant Polarfrey". (AUDIO: Disassembled)
