ضيوف الحلقة
Hakeem Muata OluseyiSelf - Astrophysicist/AuthorEEdward T. O'DonnellSelf - Historian
CChris RaynorSelf - Orthopedic Surgeon
Don WildmanSelf - TV Host/HistorianAAustin RogersSelf - Jeopardy! Champion
Hakeem Muata OluseyiSelf - Astrophysicist/AuthorDon WildmanSelf - TV Host/Historian