Guest:  Jeff Greason;  Topics:  Advanced propulsion, beamed propulsion, electric vehicles, cost factors, launch markets, nuclear propulsion, Tau Zero Foundation, Electric Sky and more.

Guests: Marc Millis and Paul Gilster. Topics: DARPA One Hundred Year Starship Project, interstellar space travel, management of long duration projects. You are invited to comment, ask questions, and discuss the Space Show program/guest(s) on the Space Show blog, http://thespaceshow.wordpress.com. Comments, questions, and any discussion must be relevant and applicable to Space Show programming.

Guest: Marc Millis. Topics: Breakthrough propulsion, fusion energy, incomplete physics, far out theories and research. Marc Millis returned to the program to discuss breakthrough and far out propulsion ideas. Find out more about his work and his organization Tau Zero Foundation by visiting www.tauzero.aero. In our first segment, Mr. Millis told us about the cancellation of the NASA Breakthrough Propulsion Physics Project which he once headed. This is a fascinating story, don't miss it.