Doctor Who: The 50th Anniversary Collection

Earth, 2526. A palaentological expedition has been horrifically slaughtered by an unseen force and a squad of soldiers is investigating... just as the TARDIS lands in the area.

Deadly androids. A massive bomb. Who is behind the attacks in the caves? The Doctor follows the clues to a freighter in deep space, where an old enemy awaits...

Accused of murder, the Doctor must persuade the crew of an Earth freighter to change course -- before the slumbering menace in their hold awakes.

A massive Cyberman invasion force is determined to strike Earth. The Doctor works to defeat them... but victory may come at a terrible cost.

Through some fluke, the Doctor and Tegan arrive in the 17th century, where they discover three Terileptil prison escapees who are trying to destroy life on the planet with an enhanced version of the great plague.

Part 2 of "The Visitation".

Part 3 of "The Visitation".

Part 4 of "The Visitation".