Who's Afraid of a Big Black Hole?
- Episode aired Nov 3, 2009
Samuel West
- Self - Narrator
- (voice)
Shep Doeleman
- Self - Massachusetts Institute of Technology
- (as Dr Shep Doeleman)
Reinhard Genzel
- Self - Max-Planck Institute for Extraterrestrial Physics
- (as Prof Reinhard Genzel)
Michio Kaku
- Self - City University of New York
- (as Prof. Michio Kaku)
Lawrence Krauss
- Self - Arizona State University
- (as Prof Lawrence Krauss)
Douglas Leonard
- Self - San Diego State University
- (as Prof Douglas Leonard)
Ramesh Narayan
- Self - Harvard University
- (as Prof Ramesh Narayan)
Andrew Strominger
- Self - Harvard University
- (as Prof Andrew Strominger)
Max Tegmark
- Self - Massachusetts Institute of Technology
- (as Prof Max Tegmark)
