Dr. Matlock delivers the South Park Elementary staff of the Principal Victoria era the news that Eric Cartman was diagnosed with HIV due to bad treatment in the hospital. He also tells The Boys the news, which makes Kyle Broflovski happy, and calms them down that Cartman's new disease is not contagious.
Dr. Matlock appears to be in his early sixties. He wears a doctor's clothing. He is a white male with gray wavy hair and wrinkles. Dr. Matlock's model was redesigned to look younger and was used as Dr. Chet Mowlins in "Shots".