In the run-up to series 9's premiere, BBC America are running a four day marathon of Doctor Who content, including the prequel to The Magician's Apprentice, The Doctor's Meditation.
The marathon will feature selected episodes from Tennant, Smith and Tom Baker as well as Capaldi's entire series so far in the run up to the premiere of The Magician's Apprentice. After the premiere, it will also repeat several New Who episodes as well as special showings of select Tom Baker episodes (e.g. Genesis of the Daleks).
The Doctor's Meditation, the prequel to series 9 will air on the 18th at 10pm with a timeslot of 10 minutes.
You can view BBC America's full schedule in detail here.