Tyrannosaur (Deep Breath)

A female tyrannosaur was accidentally transported to Victorian London when Twelfth Doctor's TARDIS got lodged in her throat. While in London, she was alone and afraid.

Biography
Born in the distant past, this tyrannosaur was brought forwards to the 1890s when the Twelfth Doctor's TARDIS got lodged in her throat.

In Victorian London, a crowd formed around the dinosaur as she waded in the Thames, before the Paternoster Gang arrived and liaised with Inspector Gregson. Madame Vastra instructed the police to place sonic lanterns around the dinosaur in twenty foot intervals to "incline" the tyrannosaur to stay within the area.

When the dinosaur dislodged the TARDIS from her throat, Gregson mistakenly believed she had laid an egg, leaving Vastra questioning his grasp on biology. The Doctor, although suffering from the after effects of his regeneration, was still able to communicate with the dinosaur; she told him she had a headache, so he told Vastra and Jenny Flint to reduce the frequency.

At least one man believed that the dinosaur wasn't real but just a "usual trick" by the government.

Shortly after being taken to Vastra's home and exiting onto the rooftops, the Doctor apologised and promised to return her home safely, but was unable to when she burst into flames. (TV: )

Death
The tyrannosaur was killed by the Half-Face Man, as he needed her optic nerve to repair himself and the other Clockwork Droids who were set on reaching the apparent "Promised Lands" they had been trying to reach for millennia. (TV: ) After defeating the Half-Face Man, the Twelfth Doctor wrote in his diary, citing being swallowed by a dinosaur as one of the many reasons he was justified to not be grinning. (PROSE: ) He also expressed remorse about the dinosaur. (PROSE: )

Appearance
Madame Vastra stated that tyrannosaurs were generally as large as this one, who was around the same height as the Big Ben, (TV: ) 96.3 metres tall. (PROSE: ) Jenny Flint disagreed, as she the fossils she had seen were smaller, but Vastra asserted herself as she had lived in the tyrannosaur's time period. (TV: )