The Doctor comes face to face with the Dalek Emperor but manages to rescue Rose. They return to Satellite 5 to prepare for the invasion with Captain Jack organizing the armed resistance and the Doctor rewiring the station to produce a deadly Delta wave. The Doctor had always promised to take care of Rose and knowing that the Delta wave will destroy everything, he forces her to return to Earth on the TARDIS. With Mickey's help, she finds a way to return to Satellite 5 and acquires a great power, one that will be the end of the Doctor as we know him.
—garykmcd