The sound also becomes similar to that in Genesis of the Daleks. And Davros's lab certainly evokes the one in Genesis, with sinister sounds from the mutated children. There is even a chilling scene where Davros decides to feed Ludella, who wants her son back, to the mutants, wondering if she will wake to see how pleased her son is to see her.
And in a nice irony a Thal becomes the first Dalek, with Davros capturing the spy Baran (who is amusingly played by Nicholas Briggs, who voices the Daleks) and transplanting him into the Mark I Travel Machine. Thus I, Davros ends just before Genesis of the Daleks, with the listeners knowing what will happen next.
I, Davros is an excellent series, with good cast, characters and plot. There are elements of I, Claudius certainly, but the ideas are put together in their own fantastic way. The special features CD was a good listen as well, talking about the actors, characters, and making off this series. Gary Russell's last work with Big Finish is a fine piece.