Serenity

Serenity is a name that has several meanings in the DWU:
 * Serenity (Cold Fusion), a Trakenite colony that survived the destruction of Traken (MA: Cold Fusion)
 * Serenity (Legacy of the Daleks), a cat owned by Becca who gave birth to a tabby that ultimately travelled with the Eighth Doctor for a while (EDA: Legacy of the Daleks)
 * Serenity (The Ultimate Treasure), a pleasure planet the Fifth Doctor and Peri visited in PDA: The Ultimate Treasure