Complex sentence: Smith had previously acted in recurring roles in many long-running Australian television serials like "Bellbird", "Matlock Police" and "Prisoner", and was script editor of "Prisoner" for most of its eight-year run.
Split into simpler sentences: Smith had previously acted in guest roles in drama series such as "Matlock Police", and in regular or recurring roles in long-running Australian television serials "Bellbird" and "Prisoner". Smith was also script editor of "Prisoner" for most of its eight-year run.