From TARDIS Index File, the free Doctor Who reference.

"Do you like them, Mr. Phillips? I made them myself. I'm ever so good at science, sir. Molecular fringe animation, fashioned in the shape of straw men, sir. My own private army. Ever so clever, sir."

―Son of Mine

The Family of Blood used scarecrows as mindless soldiers through the power of molecular fringe animation in rural 1913 England.

Profile

Jeremy Baines of Farringham School for Boys had already stumbled across their ship and gotten taken over by Son of Mine.

Son of Mine implied that he had created the walking scarecrows while occupying Jeremy Baines' body.

The Family then used scarecrows to abduct Humans to be used as bodies for the incorporeal Father, Mother and Daughter.

The scarecrows were then used as an army to attack Farringham School for Boys, where many were shot down. Eventually, they re-animated to do more of the Family's bidding. They were made inanimate once more after the family's defeat. Son of Mine was himself turned into an immobile living scarecrow (of a different kind) by the Doctor. (DW: Human Nature/The Family of Blood)

See also

• Animated scarecrows (Time Lords)