This is a fan-made trailer for the shadowy Big Finish adventure “The Day of the Vashta Nerada,” starring the Eighth Doctor.
Join the Eighth Doctor as he stumbles across Synthesis Station where he discovers that the Time Lords have sponsored a project to weaponise some already-lethal creatures. In doing so, Eva Morrison and her team have unwittingly used a colony of Vashta Nerada with a very unfortunate history of humanoid contact. The Doctor finds himself leading a desperate race for survival, in which the shadows may be the least of their worries…
