ENT Season 3 Episode 5 Impulse

Plot

Captain Archer carries Sub-Commander T'Pol into sickbay, where he and Doctor Phlox strap her to a bed. She awakes and threatens to kill Archer, and Phlox sedates her. A day earlier, Enterprise received a distress call from the Vulcan cruiser Seleya, and found the ship adrift in an asteroid belt rich in Trellium ore. Archer decides to send in a shuttlepod as Enterprise is too big to maneuver among the asteroids. En route, T'Pol informs the other members of the away team that the Vaankara had been sent into the Expanse to find the Seleya, but the crew began to attack one another and the ship was destroyed. Meanwhile, Commander Tucker and Ensign Mayweather decide to mine some Trellium ore from an asteroid.
Lieutenant Reed, T'Pol and Archer board the Seleya and are attacked by zombie-like Vulcans. Soon T'Pol begins to show the same effects as seen in the other Vulcans. Archer and the away team fight their way to the Seleya's Engineering section, where they attempt to re-route the bulkhead controls on the ship so they can get back to their shuttle. They discuss a general override, which would unlock the bulkheads, but also shut down the containment on the warp core, and T'Pol accuses Archer of wanting to kill all the Vulcans.
Tucker and Mayweather retrieve the ore, but their shuttlepod is damaged in the process. After they return to Enterprise they begin repairs. Meanwhile, the Vulcan crew begins to gas Engineering, forcing Reed to activate the override. Archer's away team head back to the shuttle and arrive moments before the Seleya is due to explode, but find the docking clamps locked. Tucker and Mayweather then arrive on the second shuttle and shoot out the clamps and the two shuttles depart, as the Seleya is destroyed. Tucker announces enough ore was recovered to shield the forward hull, but Archer notes that it will harm T'Pol, and orders it stored in a bio-hazard locker until a cure can be created.