LEXX
In the television series Lexx, the fictional planet "Water" is the afterlife for all good souls. Like its counterpart Planet Fire, the souls have no memory of how they arrived there; they simply "woke up" there one day. Water met its destruction at the hands of the LEXX, the most powerful starship ever constructed, at the end of Lexx Season Three.
The nature and names of "Fire" and "Water" may be a nod to Philip Jose Farmer's Riverworld.
War Planets:Shadow Raiders
In the 3D CG animated television series Shadow Raiders by Mainframe Entertainment, based on the toy line War Planets, Planet Water is the planet that was turned into a gigantic weapon to fight the Beast Planet.