10.4 The Primeval Design by Helen Goldwyn
Dorset, 1830. The Doctor has taken Leela to meet Mary Anning, the noted palaeontologist, but the duo immediately stumble into trouble.
A body has been found in unusual circumstances. Attacked by an animal... but one of a size unknown in the area.
It turns out some things might be better off staying buried.
Note: This title is also available on CD as part of Doctor Who: The Fourth Doctor Adventures Series 10 Volume 02