On March 6, 2006, Underoath's next album was announced for release in three months' time. The music video for "Writing on the Walls" premiered on
MTV's
Overdrive program on June 13, 2006. According to Dudley, it was influenced by 1960s theatrical films, "depict[ing] a murder mystery in a surrealistic gothic-tinged setting". A special edition included a DVD with a making-of documentary on the album. To promote it, the band appeared on
MTV's
T-Minus Rock and
Headbangers Ball, and
Fuse's ''Steven's Untitled Rock Show''. Listening parties were held at
Hot Topic stories, which was the first time in that company's history. "Writing on the Walls" was released to radio on June 27, 2006. The music video for "In Regards to Myself" premiered through
Yahoo! Music on September 12, 2006; the track was released as a single on November 27, 2006. The video is a critic on people idolizing
popstars, with the band being seen partway through playing in a never-ending series of corridors. A
DVD version was released that included videos for both "Writing on the Walls" and "In Regards to Myself". Both were filmed in Sweden with the production team Popcore Films; Anders Forsman handled the former, while Linus Johansson did the latter. On May 14, 2007, the music video for "You're Ever So Inviting", which was filmed in Sweden with Popcore Films earlier in the year, was posted online. In July 2007, the band released their first
video album titled
777, which included footage from the 2006 Warped Tour, Taste of Chaos and The Bamboozle Festival. On September 12, 2007, a music video was released for "A Moment Suspended in Time". It was also directed by Popcore Film and was filmed in Sweden.
Reissues and full-album performances Define the Great Line was included in the
Play Your Old Stuff: An Underoath Anthology (2011) three-CD set, alongside their third studio album
The Changing of Times (2002) and ''They're Only Chasing Safety
. Define the Great Line
was packaged with They're Only Chasing Safety'' as a two-LP set to promote the band's Rebirth Tour in 2016, during which they performed both albums in full. Coinciding this, Underoath performed all three albums in their entireties as part of the Underoath: Observatory livestream series. "In Regards to Myself", "You're Ever So Inviting", and "Writing on the Walls" were included on the band's second compilation album
Anthology: 1999–2013 (2012). "In Regards to Myself" and "Writing on the Walls" were included on third compilation album
Icon (2014). ==Touring==