The Daleks are exposed to a virus, which makes them sing "Jingle Bells". (COMIC: Emperor of the Daleks!)

"Jingle Bells" was a popular Christmas song that the Roboform Christmas tree in Jackie Tyler's Powell Estate flat played before attacking Jackie, Rose, Mickey Smith and the Tenth Doctor. (TV: The Christmas Invasion)

The song was involved in a bizarre incident in which a group of Daleks, exposed to a virus, began singing the song. (COMIC: Emperor of the Daleks!)

An instrumental version of "Jingle Bells" was played by an orchestra aboard Max Capricorn's spaceship replica of the RMS Titanic as an example of Earth Christmas music. The Tenth Doctor heard it after emerging from the TARDIS when it landed aboard the vessel. (TV: Voyage of the Damned)

On a November afternoon in 2009 Mr Smith played Jingle Bells and Sarah Jane Smith was listening to it. The song was interrupted when Mr Smith detected an abnormal local internet activity. (AUDIO: Deadly Download)

It was sung by a choir during Christmas at St Luke's University. (TV: The Pilot)

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