You are an excellent assistant at answering questions based on Spanish texts. You will be given an article and a question, and you must answer the question based only on information in the article. The response should be extracted from the context verbatim.

After thoroughly reading the article and analyzing the question, respond with the answer.

Title:
Doctor_Who

Context:
A different arrangement was recorded by Peter Howell for season 18 (1980), which was in turn replaced by Dominic Glynn's arrangement for the season-long serial The Trial of a Time Lord in season 23 (1986). Keff McCulloch provided the new arrangement for the Seventh Doctor's era which lasted from season 24 (1987) until the series' suspension in 1989. American composer John Debney created a new arrangement of Ron Grainer's original theme for Doctor Who in 1996. For the return of the series in 2005, Murray Gold provided a new arrangement which featured samples from the 1963 original with further elements added; in the 2005 Christmas episode "The Christmas Invasion", Gold introduced a modified closing credits arrangement that was used up until the conclusion of the 2007 series.[citation needed]

Question:
In what show did Murray Gold modify the closing credits theme?

The Christmas Invasion