This episode contains the first Star Trek female nude scene presented in a sexual context. Numerous episodes of Star Trek: The Next Generation (1987) showed or implied nudity, but in strictly non-sexual contexts (e.g. art classes, nudist living, torture, streaking in protest, etc.), and Who Mourns for Morn? (1998) (which featured Quark being seduced by a lady in a bathtub) came as close as being sensual. This episode aired in the United States on 11 February 2004 during the height of controversy over Janet Jackson inadvertently exposing a breast during the Super Bowl halftime show, on a network owned by CBS (which was taking heat for the incident). As a result, the scene in which T'Pol's rear end is exposed was censored in the USA by zooming in on the scene, and keeping her buttocks just out of frame. Canadian broadcasts, however, were uncensored, as were later DVD and streaming editions.
When the tactical alert is initiated in this episode, an alarm sounds that was never included in any episodes prior to this nor after it.
Thomas Kopache is one of only a few actors to appear on all four of the Star Trek TV spin-off series and is one of only five actors to play seven or more different characters in Star Trek (the others being Jeffrey Combs, Randy Oglesby, J.G. Hertzler and Vaughn Armstrong).
The device on the wall at the beginning of the phase rifle training scene has several protrusions that are exactly like Uhura's ear piece from the original series. They have appeared several times in Enterprise as parts of other devices.
T'Pol references Sim, a short-lived clone of Tucker seen in Similitude (2003), who revealed his feelings (and thus, Tucker's feelings) to her.