Serenity was a pleasure planet in the Cartovallian Stellar Empire. Rovan Cartovall, first son of Emperor Dorrian III, disappeared while en route to this vacation world. This disappearance became a legend and set many people over the following years on a chase to find the missing treasure of the missing imperial heir. (PROSE: The Ultimate Treasure [+]Christopher Bulis, BBC Past Doctor Adventures (BBC Books, 1997).)
Tardis