Name – Robot Santas
Species – Robot
Planet – Unknown
Temperament – Murderous
Appearances – The Christmas Invasion, Runaway Bride

The robot Santas were playing music in the market when Rose and Mickey went Christmas shopping. They began firing on them with musical instruments turned into weapons. They followed them back to the Powell Street Flats. The Doctor sees them in the yard and points the sonic screwdriver at them. They vanish in a blue light. The Doctor calls them pilot fish, heralding the arrival of something bigger, and thinks they are coming for him, but that seems to be red herring, since the Sycorax seem unaware of The Doctor until he comes for THEM. A popular theory is that they were actually sent by the Racnoss and were a year early. They were back to terrorise him again a year later when one of them kidnapped Donna in a taxi and they later turn up to devastate her wedding reception. They are, at that point, working to the Racnoss’s orders, simply as hired guns.