Theory of a Deadman (AKA THEORY) are an award-winning Canadian rock/alt-metal band from Delta, British Columbia, formed in 2001.
Band members include founder members: Tyler Connelly - vocals and guitar, Dave Brenner - rhythm guitar/ vocals and Dean Back - bass, plus Joey Dandeneau - drums.
They released their debut, platinum-selling eponymous album in 2002, followed by: "Gasoline" (2005), "Scars & Souvenirs" (2008), "The Truth Is..." (2011), "Savages" (2014), "Wake Up Call" (2017), plus 2020's: "Say Nothing" and 2023's "Dinosaur".