Appearance: The Woman Who Fell To Earth

In order to become the race’s next leader, the Stenza must travel 5000 galaxies to planet Earth and hunt their selected human trophy in a ritual they call ‘The Ritual of the Stenza’. The Stenza have very cold skin and can kill humans with a touch of their hands, freezing them to death.

A Stenza warrior known as T’zim-Sha (or Tim Shaw as the Doctor called him) came to Sheffield to locate and kill his selected target, Karl Wright. He arrived to Earth in a transport pod. Like his skin, this too was cold to the touch. He also arrived with a Gathering Coil, half-organic, half-machine, which he used to help locate his trophy. Beneath his removable face plate, dozens of teeth were grafted to his face; each tooth taken from a victim, representing a conquest.

Appearance: The Ghost Monument

The Remnants looked like a harmless pile of rags that lay dormant until night time, where they lay in wait to ambush the Doctor and her friends. They are made from a high-density polyfibre, can sense fear and blood and will squeeze you to death – like a Boa Constrictor.

Appearance: Rosa

Krasko travelled from the future to Alabama using a vortex manipulator. One of the devices he bought back from the future was a weapon that could displace things in time.

Due to him being a former prisoner of Stormcage, he was implanted with a neural restrictor in his brain - which prevented him from hurting anyone. He targeted Rosa Parks, whose actions kick-started the civil rights movement.

Appearance: Arachnids In The UK

There are around 45,000 species of Spiders on Earth.Spiders taste and smell through their feet. They give out pheromones and really like grime music.

They aren’t responsible for what has happened to them. The spiders were just doing what came naturally. The Doctor taught her friends to respect the living creatures and preserve life wherever possible.

Appearance: The Tsuranga Conundrum

The Pting is a small but mighty alien with sharp teeth, toxic skin, and can move faster than Usain Bolt.The creature is impossible to keep captive and can survive in the vacuum of space.

The Doctor and friends got separated from the TARDIS and the Pting was eating the spaceship they were on – The Tsuranga.The Pting wasn’t malicious, but its natural behaviour would have caused the death of everyone on board the Tsuranga.

Appearance: Demons Of The Punjab

The Thijarians who met the Doctor were survivors of the destruction of their civilisation. They were not there at the end, to grieve of honour them.

The Thijiarians did not come to Earth to kill. They watch over the victims of the fighting, and bore witness to those who died alone.