It also introduced the vocals of Melanie Peppenheim, who would sing on many other compositions throughout the show.
[youtube]http://www.youtube.com/watch?v=FRrOI7By5fc&index=4&list=PLD1110BD00889E104[/youtube]
This in contrast to the warm earthiness of "Rose's Theme", which was used all the way to her departure in Series Two.
[youtube]http://www.youtube.com/watch?v=hkh1hWLtOdg&index=15&list=PLD1110BD00889E104[/youtube]
"Doomsday" marked the end of Series 2 and Rose Tyler's departure, a combination of classic choral vocals[...]