Star Trek: Enterprise - The Seventh Season 2 Episode 7
When T'Pol is assigned a secret mission by the Vulcan High Command, she asks Archer to accompany her. The captain is surprised by her request, but agrees — especially when T'Pol reveals that there is a personal side to the mission. Many years ago, T'Pol was sent to retrieve several rogue Vulcan operatives. She was able to apprehend all but one of them, a man known as Menos. Now, the Vulcans believe they have located Menos, and they want T'Pol to bring him in.