Ravens of death
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The ravens of death were mechanical ravens, amongst the arsenal controlled by Kate Stewart of UNIT. (TV: The Power of Three) They were stationed around the Tower of London. Malcolm Taylor was in charge of replacing their batteries, (TV: The Day of the Doctor) which was done on 19 January each year. (PROSE: Time Traveller's Diary) They were able to reproduce. (WC: The Zygon Isolation)
Kate decided to have the ravens installed with infrared night vision. Colonel Vikram Shindi informed her when the upgrade was almost complete, although by that time two ravens at the Bloody Tower were still proving to be trouble. (AUDIO: Vanguard)
Petronella Osgood sent the ravens out from the Tower to observe the Tengobushi beyond their energy field. (AUDIO: The Battle of the Tower)
Osgood remote-controlled one of the ravens to interview Shana Siddiqui for a job at UNIT as an entomologist. She later sent a group of them to fly into and kill the Wirrn chasing Kate Stewart and Josh Carter in their helicopter. (AUDIO: Hosts of the Wirrn)
Behind the scenes[[edit] | [edit source]]
The ravens of death may be a reference to an old superstition behind the practice of keeping ravens inside the Tower of London. The superstition goes that "if the Tower of London ravens are lost or fly away, the Crown will fall and Britain with it."
