Mark Gemini Thwaite, also known as MGT, is an English musician who has been the guitarist for a number of rock bands and artists, including The Mission, trip hop pioneer Tricky, Peter Murphy of Bauhaus, New Disease, Spear of Destiny & Theatre of Hate, Mob Research, and Canadian band National Velvet plus various live and recorded appearances with Gary Numan, Al Jourgensen of Ministry, Revolting Cocks, Roger Daltrey of the Who, P.J. Harvey, Alanis Morissette, Raymond Watts and PIG, Primitive Race, Ricky Warwick of Thin Lizzy, Ginger of The Wildhearts, Stan Lee of Marvel Comics, Franz Treichler of The Young Gods, Miles Hunt & The Wonder Stuff, Burton C. Bell of Fear Factory, American rapper DMX, Laurence "Lol" Tolhurst and Porl Thompson of The Cure and Ville Valo of Finnish band HIM.

The Mission are an English gothic rock band formed in 1986. Initially known as the Sisterhood, the band was started by frontman Wayne Hussey and bassist Craig Adams, soon adding drummer Mick Brown and guitarist Simon Hinkler. Aside from Hussey, the lineup has changed several times during the years and the band has been on hiatus twice.