Peg doll (Night Terrors)
The Peg Dolls were dolls that inhabited the doll's house in George's cupboard. (DW: Night Terrors)
Powers and abilities
The Peg Dolls turned their victims into other Peg Dolls. The transformation was swift. It began with the hands, which grew bigger and turned to wood, followed by the rest of the victim's body. None of the person's original personality remained; the Doctor referred to it as a state of 'living death'. It was possible to reverse the process, and the victim had full memory of the ordeal. (DW: Night Terrors) The dolls were also capable of talking, and throughout the entire episode, they are heard singing a haunting rhyme leading towards the Doctor's death.
Tick tock goes the clock
And then what shall we play
Tick tock goes the clock
Now summer's gone away
Tick tock goes the clock
And what now shall we see?
Tick tock until the day
Till thou shalt marry me
Tick tock goes the clock
And all the years they fly
Tick tock and all too soon
You and I must die
Tick tock goes the clock
We laughed at fate and mourned her
'Tick tock goes the clock'
'Even for the doctor'
Tick tock goes the clock
Tick tock goes the clock
Tick tock goes the clock
Doctor, brave and good
He turned away from violence
When he understood the falling of the Silence
'Tick tock goes the clock'
'He cradled and he rocked her'
Tick tock goes the clock
Till River kills the Doctor
Tick tock goes the clock
He gave all he could give her
Tick tock goes the clock
Now prison waits for River.
History
The Peg Dolls inhabited the doll's house in George's cupboard, which became a psychic repository for all his fears. Subsequently, the dolls were animated, and began hunting any individuals who appeared in the house to turn them into Dolls. When Rory and Amy were trapped in the house, they stumbled across the dolls and believed they were harmless.
Eventually they realised the extent of their powers when they witnessed Purcell being turned into one of them, and tried evading them as much as possible. They also began hunting the Doctor and Alex when they appeared in the doll house, until they managed to corner them and Rory, having managed to convert Amy in the meantime. They proceeded to attack them, momentarily stopping when George himself appeared in the same room.
The Dolls turned their attention to George and surrounded him, until Alex pushed them aside to comfort his son and assure him that he would never abandon him, which brought them to an immedate stop. When Alex's unconditional love for his son allowed George to overcome his fears, the Peg Dolls were expelled from the house and reverted to their original form. (DW: Night Terrors)