The Enterprise crew is thrilled to encounter the biggest comet humans have ever seen, one that's 82.6 kilometers in diameter with a spectacular tail. Learning the comet contains large quantities of eisilium, an extremely rare mineral, Captain Archer dispatches Lt. Reed and Ensign Mayweather to take a little "comet-walk" with a drilling rig to collect samples. As they prepare for their mission, a Vulcan starship, the Ti'Mur, approaches unannounced. Archer hails the ship, and its captain, Vanik, informs him they are not there to investigate the comet, but rather to investigate Enterprise's interest in the comet. Although irked, Archer gracefully invites Vanik to stay and watch, but then he pulls T'Pol aside to find out what they're "really" doing here. T'Pol has no answers.
Star Trek: Enterprise, a prequel set before the original series, follows the crew of Earth's first warp five starship. Lead by Jonathan Archer and his crew, the series follows their adventures as they explore never before seen parts of the galaxy, setting foot on new worlds and meeting new races, as well as some familiar ones.