Warning: this article contains spoilers for Doctor Who Series 1After a 16-year hiatus, Doctor Who's return to the BBC in 2005 brought action and excitement back to the decades-spanning series with Christopher Eccleston's bold performance as the leather-jacket-clad Ninth Doctor. However, the show's energetic rebirth in the new millennium brought more to the table than the return of the TARDIS and its quirky history; it also gave us a glimpse into the Doctor's darker side.