Dr. Octagon is a persona created and used by American rapper Keith Matthew Thornton, better known as Kool Keith. Thornton performed and released four studio albums under the alias. Having introduced the character in 1993 on the unreleased Ultramagnetic MC's demo "Smoking Dust", Thornton's first full-length recording as Dr. Octagon was on his 1996 debut solo album, Dr. Octagonecologyst. The character was murdered by Dr. Dooom on Thornton's 1999 album First Come, First Served, and was briefly revived before once... [more on Wikipedia]