Featured the first appearance of a Rigellian ship.

As seen in this episode, Andorians have a rite of combat that serves as justice, named the Ushann. Both combatants are linked together with a binding wire connected to an upper arm and hand-surrounding cuff on one of the arms of each, and that the weapon used by the free arm/hand is called an Ushann-Tor, an ice-mining tool used on Andoria that is a hand-held blade with a wrist-grip.

This episode received the 2005 Emmy nomination for Outstanding Prosthetic Makeup For A Series, Miniseries, Movie Or A Special.

The detection grid used by the allied fleet is reminiscent of the tachyon detection grid used by Picard and a fleet of Starfleet ships in the TNG episode "Redemption, Part II". That episode also dealt with locating Romulan ships. Perhaps Picard got his idea from scrolling through history texts of Romulan incursions.

This episode marked the first time we've seen the four founding members of the Federation (Humans, Vulcans, Andorians, and Tellarites) together since the original series episodes "Journey to Babel" and "Whom Gods Destroy".