Host Dr. Michio Kaku speaks with first speaks with Dr. Brian Greene on String Theory and in the second half speaks with Dr. Lisa Randall on Higer Dimensions. 

Host Dr. Michio Kaku speaks with Lester Brown on the state of the world.

Host Dr. Michio Kaku speaks with on the topics of "fusion in a bottle" with Prof. Charles Seife and "your inner fish" with Dr. Neil Shubin.

Dr Michio Kaku speaks on the topic of contacting aliens in space with guest Dr. Seth Shostak.