Homeworld:

Unknown

Goverment:

The Priests of Silencio

History:

- Started in Earth's distant future as Confessional Priests
- A renegade sect became obsessed with preventing the Siege of Trenzalore
- Travelled back in time, influencing human history over a long period of time
- Attempted to create a fixed death for the Doctor at Lake Silencio
- The Doctor implanted a post-hypnotic suggestion into footage of the Moon landing;
- All were forced to flee the Earth, as Humans would kill them on sight

Classification:

Humanoid

Life Expectancy:

Unknown

Blood:

Unknown

Anatomy:

- Grey skin
- Small eyes in deep recesses in the skull
- Genetically engineered by the Church
- Seven feet tall
- Bulbous heads
- Mouthless faces
- Had four large fingers
- Often produced highly eerie rattling sounds

Abilities:

People would forget their encounter with them when they looked away