The Doctor takes Rose home, but when a spaceship crash-lands in the Thames, London is closed off and the whole world goes on red alert. While the Doctor investigates the alien survivor, Rose discovers that her home is no longer a safe haven.
Air date: April 16, 2005
Writer: Russell T Davies
Director: Keith Boak
Release date: 16 April 2005
Executive producer(s): Russell T Davies; Julie Gardner; Mal Young;
Music by: Murray Gold
Production code: 1.4