Present status of intermediate reaction theories -- Nuclear equilibration processes at moderate excitations -- Pre-equilibrium emission in neutron and proton induced reactions -- The intermediate state in fission and shape isomers -- Nuclear molecular structure in heavy ion scattering -- Molecular resonances and intermediate processes in heavy ion reactions -- Intermediate structure in isobaric analogue resonances -- The energy-averaged S-matrix and doorway resonances -- The mechanism of fast neutron radiative capture -- Simple structures in the exit channel -- Summary and conclusions.