Robert Vaughn gra osobę zamieszaną w tuszowanie zbrodni i na nim koncentruje się uwaga Columbo, jednak nie jest on mordercą.
Seria 6 (1976–1977) Fade in to Murder: William Shatner Old Fashioned Murder: Joyce Van Patten The Bye-Bye Sky High IQ Murder Case: Theodore Bikel
Seria 7 (1977–1978) Try and Catch Me: Ruth Gordon Murder Under Glass: Louis Jourdan Make Me a Perfect Murder: Trish Van Devere How to Dial a Murder: Nicol Williamson The Conspirators: Clive RevillSeria 8 (1989) Columbo Goes to the Guillotine: Anthony Andrews Murder, Smoke, and Shadows: Fisher Stevens Sex and the Married Detective: Lindsay Crouse Grand Deceptions: Robert Foxworth
Seria 9 (1989–1990) Murder: A Self Portrait: Patrick Bauchau Columbo Cries Wolf: Ian Buchanan Agenda for Murder: Patrick McGoohan Rest in Peace, Mrs. Columbo: Helen Shaver Uneasy Lies the Crown: James Read Murder in Malibu: Andrew Stevens
Seria 10 (1990–1991) Columbo Goes to College: Stephen Caffrey oraz Gary Hershberger (1990) Caution: Murder Can Be Hazardous to Your Health: George Hamilton (1991) Columbo and the Murder of a Rock Star: Dabney Coleman (1991)