The Tenth Doctor and Donna join forces in order to protect the world , in The Stolen Earth .
In finale episodes `` The Stolen Earth '' and `` Journey 's End '' ( which cross over with spin-offs Torchwood and The Sarah Jane Adventures ) , the Doctor and Noble reunite with former companions Rose , Sarah Jane , Martha , Jack , and Mickey to save the universe from Davros ( Julian Bleach ) , the creator of the Daleks .