Tracer Bullet is a seldom-seen alter-ego of Calvin's. The character, a private investigator based on any number of film noir and detective novel clichés, makes his first appearance in a story arc in which Calvin gets a bowl haircut courtesy of Hobbes. When Calvin was forced to wear a hat to cover his bad haircut, the alter-ego was born, and he would appear in a total of three story arcs. His rate is $50 a day plus expenses. However, in his first introduction he claims business is poor, as he has "an office on 49th Street and a nasty relationship with multiple collection agencies". Tracer Bullet is a skilled marksman, and also claims "if business were as good as my aid, I would be on Easy Street".