Complex sentence: The Doctor tells Courtney to put a DVD in the TARDIS console to get it back to him; the Tenth Doctor used this method to get the TARDIS back from the Weeping Angels in Blink.
Split into simpler sentences: The Doctor tells Courtney to put a DVD in the TARDIS console to get it back to him. The Tenth Doctor used this method to get the TARDIS back from the Weeping Angels in Blink.