  The de Broglie-Bohm pilot wave interpretation of quantum mechanics is shown
to provide a consistent explanation for a single relativistic particle (more
accurately, a single particle process since pair production is addressed). This
is accomplished by incorporating the Feynman-Stueckelberg interpretation of
anti-matter. The lack of conserved probability and existence of negative energy
solutions is studied through this interpretation. We discuss the resolution of
Klein's original paradox through the pilot wave interpretation, and similarly
analyze the potential barrier problem. Simulations are presented for a wave
packet incident on potential steps & barriers of various heights.
