'Doctor Who' has been embedded in British pop culture since it first aired in 1964. Now, 51 years later, more and more Americans are taking notice of the Time Lord and his TARDIS.

Tonight (9/19/15) marks the launch of the new season of Doctor Who. As Peter Capaldi continues his run as the 12th Doctor, the show picks up where it left off at the end of season 8. BBC America is running a marathon leading up to the new episode at 9pm tonight.

Similar to the 50th anniversary episode, there is another story, a prologue, that takes place before the 9th season starts. Check out that prologue here: