Dr. Know is an American hardcore punk band from Oxnard, CA. One of the founders of the "Nardcore" punk movement from Oxnard, CA, The band was started by Kyle Toucher, Ismael Hernandez, and Robin Cartwright in early 1981, and after auditioning a few singers, Brandon Cruz was chosen (although technically the first singer was a Ventura punk named Joey Pena). The band recorded studio versions of several early songs with Cruz, which led to television appearances and gigs on the Los Angeles circuit.