"Merry Xmas Everybody" by Slade is playing at the car repair shop Mickey works at when he hears the arrival of the Doctor's time and space vessel, the TARDIS.
A group of robots known as Roboformsimpersonate Santa Claus, playing "God Rest Ye Merry, Gentlemen" on trumpets in central London before utilising the trumpets as flamethrowers, attacking the Doctor's allies Rose and Mickey with them as part of their plan to take the Doctor's regeneration energy to recharge their batteries with. The Roboforms later remotely control a deadly Christmas tree which wrecks Rose's flat and nearly kills Jackie. During the latter sequence, an instrumental version of "Jingle Bells" plays.
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