Mr. Carlson is Cathy and M&M’s father and Mrs. Carlson’s husband. Mr. Carlson makes fun of M&M for his long hair and poor grades, and when his son goes missing, he dismisses the disappearance as a phase. However, when Cathy and Bryon find M&M on a bad drug trip, Mr. Carlson shows deep concern for his son and immediately drives to the hospital to make sure M&M is okay.