Planet (The Vault of Secrets)
From Tardis Wiki, the free Doctor Who reference
An unnamed swamp prison planet existed in the Calysteral cluster, one of several swamp planets in the cluster. It was used by the Judoon as a prison facility, was twenty million square sentons in area, and was filled with quagmire. It was also inhabited by the venomous Moxolon Swamp Viper. Androvax once acquired a disk from a Bouken pirate he met here, which would grant him access to the vault on Earth owned by the Alliance of Shades. (TV: The Vault of Secrets)
