With the Doctor, Rose and Harriet Jones trapped inside Downing Street, the world edges towards mankind's first Interplanetary War.

The Doctor is being electrocuted by the Slitheen, and Rose is busy throwing vinegar at the Slitheen to destroy them.  So what does it all add up to? World War III. The Slitheen manage to take over Downing Street, but know the Doctor is still alive, and is a huge threat. So immediatley they try to find him, Rose, Harriet Jones, Mickey and Jackie. Mickey successfully manages to hack into the security systems and launches a missile to destroy Downing Street and the alien invasion. Rose however must get out of no. 10 before the missile reaches. Of course she manages to escape. Downing Street is destroyed, but is the alien threat?