Jason Graham

The hospital is hit with an unprecedented crisis; Meredith and Cristina's surgical skills are put to the test.

A group of pirates take over a luxury yacht, which threatens Delko's career; Calleigh and Delko reach the next level of their relationship.

Nathan faces off against Sylar to keep him from meeting the president, while Sylar has his own plans for his new partner. Hiro learns that there are repercussions to regaining his ability, and Matt is forced to go to extraordinary lengths to protect his future with his family.

Sebastian prosecutes the case of a Hollywood starlet who appears to have been chased off the road to her death by overzealous paparazzi.