1x10 Six Months Ago

Most of the events in this episode take place six months prior to the events in the previous episode. Hiro seeks to change Charlie's death by going back in time, but finds out that her death is inevitable—she has a blood clot in her brain. Suresh's father meets Gabriel Gray and runs some tests on him. Gabriel adopts the name of Sylar and kills people to take their abilities. Hiro returns to the present.