An unknown alien probe cuts a slice of 4,000 km length from Florida to Venezuela, killing seven million people. The Enterprise is ordered by Admiral Forrest to return to Earth, but Captain Archer is abducted by Silik with the intention to give a message of an emissary from the future. He tells Archer that the Xindi , from the mysterious and dangerous Delphic Expanse, are preparing to attack Earth. Archer succeeds to convince the Starfleet to enhance the Enterprise and let him travel to the Delphic Expanse, under the protest of the Vulcans. Meanwhile Trip grieves the death of his sister Elizabeth, while The Klingon Captain Duras pursues the Enterprise with the intention of capturing Archer.
"The Expanse" is a full of action episode, but not totally original. I am curious about how the physics laws work in the spot based on the advice of Sival. T'Pol quits her commission with the Vulcan High Command to follow with the Enterprise, showing a great loyalty to Captain Archer. My vote is eight.
Title (Brazil): "A Expansão" ("The Expansion")