Complex sentence: Richard Belzer was cast as Detective John Munch, continuing his role from the series'; at Belzer's insistence, his character was partnered with Brian Cassidy, who was portrayed by Dean Winters.
Split into simpler sentences: Richard Belzer was cast as Detective John Munch, a character from'. At Belzer's insistence, his character was partnered with Brian Cassidy, who was portrayed by Dean Winters.