"Congratulations to Captain Dunsel," was an insult issued to Captain James T. Kirk. During the war games test of the M-5 Multitronic Unit created by Dr. Richard Daystrom, Commodore Robert Wesley awarded victory to the USS Enterprise, specifically with: "Congratulations to Captain Dunsel."

While intended as a playful insult, in the context of the episode Kirk was stung more deeply than would be usual.