Duras's ship, the IKS Bortas, would, like Duras himself, have a 24th century namesake. The 22nd-century Duras's commanding a ship of that name is something of an irony, since the 24th-century Bortas would serve on a flagship of the forces fighting against the House of Duras during the Klingon Civil War as seen in Star Trek: The Next Generation (1987).
J.G. Hertzler (Advocate Kolos) previously played the recurring character of General Martok in Star Trek: Deep Space Nine (1993), among other Trek roles.
The disease mentioned by Dr. Phlox, Xenopolycythemia, is what later afflicted Leonard McCoy in For the World Is Hollow and I Have Touched the Sky (1968).
Though never stated in dialogue, the script states that the trial took place on Narendra III. This, too, is something of an irony. As explained in Yesterday's Enterprise (1990), 192 years after Archer's trial, another ship named Enterprise would be lost, defending the Klingon outpost on the planet from an attack by the Romulan Star Empire, an act of courage which greatly improved relations between the Klingon Empire and the United Federation of Planets.