Trellium-D
| "Impulse" | |
|---|---|
| Star Trek: Enterprise episode | |
| Episode no. | Season 3 Episode 5 |
| Directed by | David Livingston |
| Story by | Jonathan Fernandez Terry Matalas |
| Teleplay by | Jonathan Fernandez |
| Featured music | Dennis McCarthy |
| Production code | 305 |
| Original air date | October 8, 2003 |
| Guest appearance(s) | |
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"Impulse" is the fifty-seventh episode of the American science fiction television series Star Trek: Enterprise, the fifth episode of season three. The episode was written by story editor Jonathan Fernandez from a story by Fernandez and Terry Matalas. It first aired October 8, 2003 on the UPN network in the United States. The episode was described by Paramount Pictures as "as close to a horror show as Star Trek gets".
Set in the 22nd century, the series follows the adventures of the first Starfleet starship Enterprise, registration NX-01. In this episode, while investigating the Delphic Expanse for a Xindi superweapon, the Enterprise responds to the distress call of a Vulcan ship. The crew on board have undergone the effects of exposure to Trellium-D, which turns Vulcans into violent zombie-like drones.
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 receives a distress call from the Vulcan cruiser Seleya, and upon arrival, they find 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.
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