Graph on the right is based on larger amount of data - they did actually include many more shows (like DS9, The Outer Limits): http://io9.com/5348003/tv-shows-surveyed-for-themes-througho...
Graph on the right is based on larger amount of data - they did actually include many more shows (like DS9, The Outer Limits): http://io9.com/5348003/tv-shows-surveyed-for-themes-througho...