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Star Trek: Enterprise/Observer Effect
| Observer Effect | |
| Season 4, Episode 11 | |
| Airdate | January 21, 2005 |
| Production Number | 40358-087 |
| Written by | Judith Reeves-Stevens & Garfield Reeves-Stevens |
| Directed by | Mike Vejar |
| Stream |  |
| ← 4x10 Daedalus |
4x12 → Babel One (1) |
| Star Trek: Enterprise — Season Four | |
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Observer Effect is the eleventh episode of the fourth season of Star Trek: Enterprise, and the eighty-seventh episode overall.
Starring: Scott Bakula (Capt. Jonathan Archer), John Billingsley (Dr. Phlox), Jolene Blalock (Sub-Cmdr. T'Pol), Dominic Keating (Lt. Malcolm Reed), Anthony Montgomery (Ensign Travis Mayweather), Linda Park (Ensign Hoshi Sato), Connor Trinneer (Cmdr. Charles "Trip" Tucker III)
Contents |
Plot Overview
After Hoshi and Trip contract a deadly virus while exploring a planet, two ghostly aliens possess the bodies of various Enterprise crew members to observe humanity's reaction to imminent tragedy. As the aliens secretly jump bodies to observe, Phlox strives to cure the stricken pair, but with his efforts failing, Archer must make a difficult decision in order to shield the rest of the crew from this growing biohazard.
