Dagger of the Mind is the fourth episode of the second season of Columbo and the thirteenth episode overall. It first aired on November 26, 1972 and was directed by Richard Quine. In addition to Peter Falk as Columbo, the episode stars Richard Baseheart, Honor Blackman and John Williams (the actor, not the composer).

Columbo (season 2)
1."Étude in Black" 2."The Greenhouse Jungle" 3."The Most Crucial Game" 4."Dagger of the Mind" 5."Requiem for a Falling Star" 6."A Stitch in Crime" 7."The Most Dangerous Match" 8."Double Shock"