As tickets fly off the shelves, Coheed and Cambria have expanded their "Neverender" residency tour.

The prog-rockers had planned to put the wraps on their conceptual four-album series by playing each set in its entirety during four-night stands in New York and Los Angeles between late October and early November. However, when those 15,000 tickets sold out within three hours, the bandmates figured fans wanted more, so they booked additional residencies in Chicago and London, according to a press release.

US dates are included below and details about the London shows can be found at Coheed and Cambria's website.

"'Neverender' came about because we wanted to celebrate the end of the Coheed and Cambria saga in a special way," frontman Claudio Sanchez said in a statement. "Many of these songs have never been played in front of an audience before so I think we're going to be freaking out at the same time our fans are. It's going to be a major challenge. We're psyched our fans have been so loyal and amazing. We figured they deserved this."

The "Neverender" trek is the culmination of 14 months of touring to support C&C's latest studio effort, "No World for Tomorrow," which surfaced a year ago, reached No. 6 on The Billboard 200 and spawned the mainstream- and modern-rock hit "The Running Free."

The latest set marks the final chapter of a four-part saga created by Sanchez. The storyline, which is also captured in the singer's "Armory Wars" comic book series, follows a doomed married couple who are convinced they must sacrifice their children to save the world. The drama has unfolded through Coheed and Cambria's earlier efforts: "The Second Stage Turbine Blade" (2002), "In Keeping Secrets of Silent Earth: 3" (2003) and "Good Apollo, I'm Burning Star IV, Volume One: From Fear Through the Eyes of Madness" (2005).

"Interestingly enough, us going over all the old material seems to be influencing our writing of the next record, which we're sort of doing simultaneously," Sanchez added. "And to me, that seems apropos since the next story is the prequel to 'The Amory Wars.'"