Shadows of P'Jem

Archer and the crew are startled to discover the Vulcan High Command has ordered T'Pol to leave Enterprise and are equally frustrated at her seeming indifference about reassignment. However, T'Pol's last mission as a Starfleet officer proves eventful when a militant faction on Coridan, an alien planet, kidnaps her and Archer. Aid comes in the form of the mercurial Andorians: their leader, Shran, still owes Archer a debt (from the events of "The Andorian Incident").

Synopsis adapted from TVmaze (CC BY-SA 4.0)