No North American distribution was secured prior to the release of Endless Wire, but promo copies were pressed in France, Germany, Ireland, and Ukraine.

The EP reached the top three on the Canadian Singles Chart.

The songs from this album were used in the rock musical adaptation of The Boy Who Heard Music which debuted in July 2007 as part of Vassar College's Powerhouse Summer Theater workshop series.

"Mirror Door" was released ahead of the rock opera for radio play in June 2006, but initial reaction was lukewarm due to a questionable mix.

Between dates on the 2006 UK and European tour, Townshend remixed the track, adding echo to Daltrey's vocals and giving it a punchier sound.