The Challenger EP is a companion of sorts to Sole and the Skyrider Band's critically acclaimed Hello Cruel World. Named after the 1980s Space Shuttle disaster, the title is also a representation of it's tone and sound, leaning more toward the experimental leanings of their past recordings. The band is complimented for the first time with female vocals provided by Carla Bozulich (Evangelista/Constellation Records) and Alexandrah of Solillaquists of Sound.