The Tenth Doctor is shocked when Donna Noble, in a wedding dress, appears within the TARDIS while in flight. The Doctor returns Donna to her wedding. At the reception, the Doctor determines that Donna must have absorbed a great deal of huon particles that drew her to the TARDIS. The reception is attacked by robots dressed as Santa Claus. The Doctor uses his sonic screwdriver to manipulate the sound system to destroy the robotic Santas, and discovers something is controlling them remotely from space.