Star Trek: Enterprise - Season 2 - Eps 21: The Breach
When militants take over a world, the Enterprise crew move to evacuate Denobulan geologists that are deep underground. Meanwhile, Phlox has to save a dying Antaran that refuses treatment due to the history of their races.
About Star Trek: Enterprise

Title: Star Trek: Enterprise
First Air Date: 2001-09-26
Last Air Date: 2005-05-13
Status: Canceled
Rating: 7.569/10 (from 832 votes)
Language: EN
Seasons: 5
Total Episodes: 97
Network: UPN
Genres: Sci-Fi & Fantasy, Action & Adventure, Drama
Production Companies: Paramount Television, CBS Studios
Synopsis
During the mid-22nd century, a century before Captain Kirk's five-year mission, Jonathan Archer captains the United Earth ship Enterprise during the early years of Starfleet, leading up to the Earth-Romulan War and the formation of the Federation.
Cast

Scott Bakula
Jonathan Archer

Jolene Blalock
T'Pol

Connor Trinneer
Charles 'Trip' Tucker III

John Billingsley
Phlox

Dominic Keating
Malcolm Reed

Linda Park
Hoshi Sato

Anthony Montgomery
Travis Mayweather