Dr. Octagon is one of Kool Keith's many alter egos. His initial release as Dr. Octagon was 1996's Dr. Octagonecologyst, on which he collaborated with Dan The Automator Nakamura and DJ QBert. After the name was dropped in favour of Dr. Dooom, it was widely believed that it wouldn't be used again until the release of 2006's The Return of Dr. Octagon, which Keith maintains was changed and released without his consent.
These are photos from concerts where Dr. Octagon played, so they may be of other bands that played the concert as well.
Lollapalooza 1997 North America Tour Aug 12, 1997 George, Washington, United States Uploaded by Jeremy D'ambrosio
Beck / Pavement / Sloan / Soul Coughing / Dr. Octagon / Trumans Water May 27, 1997 Pontiac, Michigan, United States Uploaded by Daniel Sylvester