Complex sentence: Walter Hartwell White (also known by his clandestine alias Heisenberg) is a fictional character, and the main protagonist, and anti-hero, in the American television drama series "Breaking Bad" on AMC.
Split into simpler sentences: Walter Hartwell White (also known by his clandestine alias Heisenberg) is a fictional character. The main protagonist, and anti-hero, in the American television drama series "Breaking Bad" on AMC.