A beautiful blond (Lynda Day) hires Mannix to investigate the mysterious actions of her father at a Mexico health ranch, run exclusively for wealthy alcoholics. In order to gain admittance to the establishment, Mannix poses as an alcoholic.
Guest star: Lynda Day George (Carol Blake), Julie Adams (Mrs. Carter), John Anderson (I) (George Blake), Sean McClory (Scott Winters), Dorothy Green (Laura), Roger Torrey (Travers), Richard Merrifield, Dick Dial, Ken Tilles, Joe Lo Presti
Writer: Sam Ross
Director: Laszlo Benedek