The Family of Blood are a family who appear in the Series 3 episodes "Human Nature" and "The Family of Blood" (2007) in which they are the titular entity. They are incorporeal, green telepathic creatures and refer to each other as "Father of Mine" (or "Husband of Mine" in Mother's case), "Mother of Mine", "Son of Mine" (who appears to assume leadership, and thus the naming of the others is compared to him) and "Sister of Mine". Because of their lack of form, they required a physical body to inhabit; they only had short lifespans without them and as such, sought that of a Time Lord. They had a time vortex manipulator allowing them to time travel. Their spaceship was stolen and was protected by an invisible shield. They could also animate different things for servants — in the case of their 1913 invasion of Earth, scarecrows — using "molecular fringe animation". They also possess hand-held energy firearms capable of disintegrating flesh and cloth.