Review by Jacob Licklider
If you were to have come to me at the beginning of 2021 and told me that within the next two years Big Finish Productions would have released not one, but seven total box sets with Christopher Eccleston as the Doctor, I would never have believed you. Yet here we are, over halfway through the second series of Ninth Doctor Adventures from Big Finish Productions and with each passing day I am surprised they keep coming. Hidden Depths is the third set of the second series and like the first two of this series the title is a reference to the major theme of things under the surface both literal and metaphorical that each episode explores in some way. While Back to Earth and Into the Stars were more geographic in their themes, Hidden Depths outside of the first story leans into the lives of their characters which kind of leads to the overarching theme of the set ironically more surface level and not as the previous five sets have felt as sequential adventures under a theme.