Russell T. Davies is about to redefine the world of Doctor Who for a second time. After reviving the franchise in 2005, bringing it back to a primetime Saturday night slot after almost two decades, Davies departed the show in 2010 following the end of David Tennants run as The Doctor. At least until 2023, when both Tennant and Davies made a shock return to the series after a lackluster response to the last several seasons of the worlds longest-running sci-fi series.