Debbie Harris is the leader of the red litter-picking tribe in Porthcawl. With just days looming before the big Clean Rubbish Around Porthcawl competition, Debbie gathers her troop together to go up against the dreaded blue team.

It has been weeks since Aled has done anything and all that matters to him is Mir. Why isn't she replying to his text messages? In his wild imagination, Mir could be doing all kinds of things without him.

When disaster hits the Titanic, the Doctor uncovers a threat to the whole human race. Battling alongside aliens, saboteurs, robot Angels and a new friend called Astrid, can he stop the Christmas inferno?