Unexpected

Enterprise discovers that a cloaked alien ship has been drawing power from its warp field. Its crew, the Xyrillians, need help with their engines, and Tucker goes aboard their ship to assist. He gets on well with their engineer, Ah'Len, who shows him the ship's holographic technology and plays a game with him that involves placing a hand on a bowl of pebbles. Back on Enterprise, Tucker notices odd symptoms, and Phlox makes a startling diagnosis: Tucker is pregnant, carrying a Xyrillian embryo. The game is the likely cause. Enterprise sets off to find the Xyrillians, who have taken refuge in the wake of a Klingon warship, and Archer has to deal with its suspicious captain, Vorok, to reach them. Tucker returns to the Xyrillian ship, the embryo is transferred to Ah'Len, and she apologises for the accident.