The crew of the Enterprise locate the missing Vulcan cruiser Seleya, adrift in the Expanse for the last nine months. Upon investigating what happened to it’s Vulcan crew, Phlox learns that the essential substance, trellium-D is a potent neurotoxin for Vulcans and T’Pol is exposed to a dangerous amount.
| Air Date | 08 October 2003 |
| Production Number | 057 |
| Stardate | n/a |
| Gregorian Calendar Date | 2153 |
| Primary Arc | The Xindi Crisis |
| Secondary Arc | n/a |
| Tertiary Arc | n/a |
| See It or Skip It | See It! |
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