Episode Title: "THE EXPANSE"
Production Number: 052
Original Air Date: 05-21-03
Stardates: April 24, 2153
An alien probe attacks Earth, killing millions of people from Florida to Venezuela. The Enterprise is recalled to Earth, but is intercepted by a fleet of Suliban ships. Captain Archer is captured by Silik and his Suliban Cabal; they take him to speak to their contact in the future, who reveals to Archer that Earth was attacked by the Xindi, who learned from another faction in the Temporal Cold War that their world would be destroyed by humans in 400 years.
Archer and the Enterprise return to Earth, where Archer informs Starfleet Command of what he was told. When a component from the future is found in the crashed alien probe, Starfleet Command agrees to allow Archer to enter the Delphic Expanse, where the Suliban's future contact indicated that the Xindi live. Vulcan Ambassador Soval warns that the Delphic Expanse is a mysterious and dangerous region of space from which few return alive, and the Vulcan High Command recalls Subcommander T'Pol from her posting on the human ship and reassigns her to the Ministry of Information, but T'Pol decides to remain aboard the Enterprise.
The Enterprise is retrofit with new armaments, including photonic torpedoes and enhanced hull plating, and a team of General Casey's best soldiers is posted aboard.
On Qo'noS, the Klingon Chancellor allows Duras to regain his honor by capturing Captain Archer, who escaped from Klingon custody. Duras pursues the Enterprise towards the Delphic Expanse, but his ship is destroyed by the Enterprise's new enhanced weapons.
Factoid: Commander Tucker's baby sister, Elizabeth, an architect, is among those killed in Florida by the Xindi attack.
Guest Characters: Duras, Silik, Admiral Forrest, Vulcan Ambassador Soval, *Captain Ramirez, *Dr. Fer'at
Alien Races: Klingons, Vulcans, Suliban, *Xindi, *Snow beetles
Starships: *S.S. Intrepid, *NX-02, *[Vulcan Vaankara]
KEY: [brackets]=illusions *star=first appearance