 Sub @-@ Commander T 'Pol , examining gravitational anomaly patterns , calculates the location of a second sphere within the Delphic Expanse ( similar to the one previously seen in " Anomaly " ) , and Enterprise diverts course to investigate . Meanwhile Ensign Sato reports to sickbay , explaining to Doctor Phlox that she has been hearing voices and feels like she is being watched . She is later contacted telepathically by Tarquin , an alien that appears in human form . He explains that he can telepathically read objects , and suggests that Enterprise bring him part of the weapon used to attack Earth ( in " The Expanse " ) . 
