Doctor Who (1963)

S20E01 Arc of Infinity (1)

In Gallifrey, a member of the high council is engaged in treachery, sending the Doctor's bio-extract from the time vortex to a being made of anti-matter. Meanwhile, on Earth, two young men from England are wrapping up their time in Amsterdam by resting in a crypt. Their night takes a terrifying turn when they are assaulted by an alien creature that is under the influence of the same anti-matter entity.