Therapy? collaborated with the short-lived rap group Fatal (part of the Soul Assassin camp, not to be confused with the hip hop artist Fatal) on the track "Come and Die" from the soundtrack to the 1993 film "Judgment Night". Cairns has contributed vocals and guitar to various recordings with different bands throughout the years – "Jonestown Mind" (1994) and "Waiting For Earthquakes" (2001) by The Almighty, "Rehab" (2000) by UK band Manchild, "Radio" (2001) by UK band Dog Toffee (although this version remains unreleased), "Gleason" (2002) by Northern Irish band Throat, "Get Your Groove On" (2003) by The Wildhearts, "F8" (2005) by This Is Menace, "The Second Triumvirate of Lavonia" (2009) by Italian band Inferno, "Crisis? What Crisis?" and "Ignite" (2014) by UK band Thirty Six Strategies and "Celebrating Sinking" (2015) by Ricky Warwick. Therapy? appear on the 2005 "Welt Turbojugend Tage" DVD, performing three songs live in Hamburg. Therapy?, along with Biohazard and Gunshot, contributed with remixes on Pitchshifter's 1995 album, "The Remix War".