Complex sentence: Some of the cast from the first film also returned, including Gert Fröbe, Eric Sykes and Terry-Thomas; the latter appeared as the son of the character he had played in the earlier film.
Split into simpler sentences: Some of the cast from the first film also returned, including Gert Frobe, Eric Sykes and Terry-Thomas. The latter appeared as the son of the character he played in the earlier film.