The Silence

The Silence is the seventh episode of the tenth season of Doctor Who. It sees the Doctor and Christina trapped on a ship in the 30th century, where a dark alien group prey on the crew.

Synopsis
"This ship is carrying something they want, and they will kill everyone onboard for it...." - The Doctor

The TARDIS lands on the HMMS Aragard, where the Capareth soon begin to prey on the crew, seeking an energy source to further sustain their race.