Complex sentence: The first hour starts off with the life of Dr. Marc D. Rayman, the chief propulsion engineer at NASA's Jet Propulsion Laboratory, and how Dr. Rayman became interested in propulsion through Star Trek.
Split into simpler sentences: The first hour starts off with the life of Dr. Marc D. Rayman, the chief propulsion engineer at NASA's Jet Propulsion Laboratory. And how Dr. Rayman became interested in propulsion through Star Trek.