A Matter of Honor motivates the murder in this 2-hour Columbo episode. Ricardo Montalban guest stars as a famous retired bullfighter. Feeling as though he's been betrayed and humiliated, Montalban kills his best friend in a manner that makes the killing seem accidental. The modus operandi: Montalban drugs his victim and plunks him in the bull ring with a particularly ferocious toro. Vacationing in Mexico, Lt. Columbo (Peter Falk) sniffs around until he's able to corner Montalban in the episode's "moment of truth." A Matter of Honor first aired February 1, 1976. ~ Hal Erickson, Rovi