Terra Prime and convinces him to provide a case file on Khouri. Meanwhile, Ensign Mayweather gives his reporter ex-girlfriend, Gannet Brooks, a tour of the ship. On the Moon, Paxton watches footage of Colonel Phillip Green ("The Savage Curtain"). Greaves enters and updates Paxton on the status of the child, and Paxton injects himself in the neck with an unknown substance. Phlox then reports that Khouri's body contained traces of a substance used in a zero-gravity mining facility. T'Pol and Tucker volunteer for an away mission to the Moon. Disguised as miners, they are quickly detained after Brooks apparently leaks details of the mission. Paxton reveals that the entire complex is a warp capable ship, and the vessel travels to Mars where it takes control of the verteron array, which normally protects the Earth from comets. He uses the array to fire a warning shot and issue an ultimatum — that all non-humans must immediately leave Earth. Production Writing and casting Showrunner and writer Manny Coto explained that the "demons" in the episode refers to the demons of intolerance that humanity must defeat before they can form the United Federation of Planets. Colonel Philip Green (the leading villain of World War III in the Star Trek universe) was originally intended to appear earlier in the season in the episode "Borderland" but the episode was instead re-written to feature Arik Soong after The Next Generation actor Brent Spiner became available; Green's appearance was one of several included in season four which linked Enterprise to The Original Series, which included the Mirror Universe and Gorn in "In a Mirror, Darkly", Organians in "Observer Effect" and the Orions in "Borderland" and "Bound". Peter Weller was cast in the role of John Frederick Paxton. Weller had previously appeared in other science fiction productions, including as the main character in the film RoboCop (1987). He also played Chuck Taggart in the television series Odyssey 5, which had been created by Manny Coto. Weller said of the plot of the episode, "The great thing about the whole Star Trek legacy is that they... metaphorize, they allegorize and they narrate what's going on the planet today". He would later go on to gain a role in the film Star Trek Into Darkness (2013). This was the third Star Trek appearance of Harry Groener, who played Nathan Samuels. He had previously portrayed Tam Elbrum in The Next Generation