Peter Rutherford

Transported back to the Earth of the distant future from the Ark, the Doctor, Harry, and Sarah discover that they have unwelcome company. An alien warrior is conducting deadly experiments to assess the suitability of the human race as an adversary prior to a full scale invasion of Earth.

Transported back to the Earth of the distant future from the Ark, the Doctor, Harry, and Sarah discover that they have unwelcome company. An alien warrior is conducting deadly experiments to assess the suitability of the human race as an adversary prior to a full scale invasion of Earth.