After forming in Washington, D.C., in 1993, the Dismemberment Plan mixed the punk of their forebears, Fugazi, with R&B and hip-hop on four well-regarded albums over the next eight years, including the acclaimed Emergency & I in 1999. But to the surprise of many, the quartet called it quits in 2003. Travis Morrison (vocals and guitar), Eric Axelson (bass), Jason Caddell (guitar) and Joe Easley (drums) played just a handful of shows over the ensuing years, before reuniting for a short tour in 2011. Working together again, the Dismemberment Plan (above, playing “Ice of Boston”) soon had a few songs to record, which eventually blossomed into their first new album in 12 years, Uncanney Valley (stream it below), out earlier this week on Partisan Records. And they celebrate its release tonight at Terminal 5.