The Cybermen (song)

"The Cybermen" was the main motif for the Cybermen composed by Murray Gold. The piece contains the darker undertones that help define the Cybermen, opening with a building mechanical march before becoming more dominated by brass horns, and later becoming faster-paced to signal the Cybermen fighting for their survival

Episodes featured in
Series 2: Series 3: The Specials: Series 5: Series 6: Series 7: Series 8: Series 10:
 * Rise of the Cybermen
 * The Age of Steel
 * Army of Ghosts
 * Doomsday
 * Human Nature (albeit very briefly)
 * The Next Doctor
 * The Pandorica Opens (briefly played to signify the arrival of the Cyber-ships and the lone Cyberman guarding the Pandorica)
 * Closing Time
 * Nightmare in Silver
 * Dark Water
 * Death in Heaven
 * World Enough and Time
 * The Doctor Falls

Other uses
It was featured in a Cybermen documentary presented by Matthew Sweet, which is included on the Cybermen Collection DVD as well as an extended edition on the Tomb of the Cybermen: Special Edition DVD.