Peter Martin Christopherson, also known as Sleazy, was an English musician, music video director, commercial artist, designer, and photographer. He was best known as a member of design agency Hipgnosis and a co-founder of the bands Throbbing Gristle, Psychic TV, and Coil. He also directed a number of music videos, prominently the Nine Inch Nails short musical horror film Broken (1993). After his relocation to Thailand in 2005, he embarked on a solo career under the name The Threshold HouseBoys Choir.