Series Four spoiler in Daily Star?

The Daily Star is reporting casting and plot information for Series Four which, if true, could be considered a spoiler. Some details are listed below, and more can be seen by following the link above. (Please note that the Daily Star's website has content which may not be suitable for all ages.)

(Thanks to Joey Donovan.)

The article says that John Barrowman (Captain Jack Harkness) and Elisabeth Sladen (Sarah Jane Smith) will both be appearing in Series Four. The Star states that the former companions will appear in the series' finale, coming to the rescue of the Doctor, who has been seriously wounded in an explosion.