Tyrannosaur (Deep Breath)

A female tyrannosaur was accidentally transported to the Victorian London when the TARDIS of the Twelfth Doctor got stuck in her throat. Her presence alerted the local authorities and led to the involvement of the Paternoster Gang to solve the situation. Eventually, the T-rex was killed and burnt by the Half-Face Man in order to steal her optic nerve. (TV: Deep Breath)

Biography
The tyrannosaur was born in the prehistoric era. Shortly after the Twelfth Doctor regenerated, the TARDIS got stuck in her throat.

Death
The dinosaur was transported to Victorian London, alone and afraid. The Twelfth Doctor exclaimed he would help her get back to her own time. The dinosaur was later burnt to death by the Half-Face Man so he could steal her optic nerve. (TV: Deep Breath)