  In this paper we construct a scattering theory for the massive and charged
Dirac fields in the interiors of sub-extremal Kerr-Newman-(anti)-de Sitter
black holes. More precisely, we show existence, uniqueness and asymptotic
completeness of scattering data for such Dirac fields from the event horizon of
the black hole to the Cauchy horizon. Our approach relies on constructing the
wave operators where the Hamiltonian of the full dynamics is time-dependent.
