When Archer and his crew pay a friendly visit to the ancient Vulcan monastery P'Jem, they stumble into an interstellar conflict between the Vulcans and their militaristic rivals, the Andorians.

Jeffrey Combs (Commander Shran)
Bruce French (Vulcan Elder)
Steven Dennis (Tholos)
Jeff Ricketts (Keval)
Richard Tanner (Vulcan Initiate)
Jamie McShane (Tactical Crewman)

• This episode marks the first appearance of the Andorians on Enterprise and of Andorian Commander Shran. The Andorian make-up and antenna effects are much more realistic than previous appearances in the other series.
  
• Under the P'Jem monestary is a huge Vulcan surveillance base, which is used to spy on the Andorians. It is a direct violation of the treaty between the Andorians and Vulcans. It seems at this point in history, Vulcans have much in common with their Romulan siblings.
  
• Jeffrey Combs (Shran) is famous for his previous recurring roles of Weyoun and Brunt on Deep Space Nine.
  
• Director Roxann Dawson played B'Elanna Torres on Star Trek: Voyager.
  
• This episode was voted the second most popular episode by fans during the push to the Enterprise series finale.