In this episode of Doctor Who: The Stolen Earth, Earth's greatest heroes assemble in a time of dire need. But can the Doctor's secret army defeat the might of the new Dalek Empire?

With battles on the streets and in the skies, the Doctor (David Tennant) and Donna (Catherine Tate) must brave the Shadow Proclamation to find out the truth. However, a fearsome old enemy waits in the shadows...

This episode sees the return of character Sarah Jane Smith, who was a companion to the third and fourth Doctors, Jon Pertwee and Tom Baker, and was a regular in the Doctor Who series from 1973 to 1976.

Also stars Billie Piper as Rose Tyler and Freema Agyeman as Martha Jones.