-
S6E13 - Problem & Solution, Who Said That?, Supernatural
-
S6E12 - Record Breakers, in Sickness & in Health, What It's Worth
-
S6E11 - Bad Ideas, Mad Science, Oddities
-
S6E10 - What Could Have Been, Conspiracy Theories, Identify This
-
S6E09 - On the Brain, Oddities, Extreme Sports
-
S6E08 - Mad Science, Problem & Solution, Bad Ideas
-
S6E07 - Get Creative, What Could Have Been, Ridiculous Theories
-
S6E06 - Oddities, Health & Fitness, the World in Numbers
-
S6E05 - Extreme Sports, Into the Wild, Origins
-
S6E04 - Inventions, in Sickness & in Health, Dinosaurs
-
S6E03 - Now and Then, Identify This, Surprising Stats
-
S6E02 - Globetrotting, Get Creative, Problem & Solution
-
S6E01 - Mad Science, Inventions, Bad Ideas
-
S4E18 - Mad Science, Now and Then, Fact or Fiction
-
S4E17 - What's in a Name, in Sickness & in Health, Inventions
-
S4E16 - Globetrotting, Bad Ideas, Identify This
-
S4E15 - Mystery Solved, What Could Have Been, Into He Wild
-
S4E14 - Origins, Record Breakers, Bad Ideas
-
S4E13 - Myths, Get Creative, Problem and Solution
-
S4E12 - Inventions, Who Said That, in Sickness and in Health
-
S4E11 - Claim to Fame, Bad Ideas, Now and Then
-
S4E10 - Globetrotting, Origins, on the Menu
-
S4E09 - Identify This, in Sickness and in Health, Ridiculous Theories
-
S4E08 - Mystery Solved, Problem and Solution, Bad Ideas
-
S4E07 - Oddities, Get Creative, Untold History
-
S4E06 - Now and Then, Into the Wild, Surprising Statistics
-
S4E05 - Mad Science, on the Brain, the World in Numbers
-
S4E04 - Mad Science, Myths, Surprising Stats
-
S4E03 - Supernatural, Record Breakers, in Sickness & in Health
-
S4E02 - What Might Have Been, Problems & Solutions, the World in Numbers
-
S4E01 - Globetrotting, Identify This, Untold History
-
S3E22 - Myths, World in Numbers, Fact or Fiction
-
S3E21 - Mad Science, Who Said That, Claim to Fame
-
S3E20 - What Could Have Been, Bad Ideas, Now and Then
-
S3E19 - Globetrotting, Problems & Solutions, Identify This
-
S3E18 - Record Breakers, Oddities, in Sickness & in Health
-
S3E17 - Fact or Fiction, Myths, Origins
-
S3E16 - In Sickness & in Health, Claim to Fame, Untold History
-
S3E15 - Inventions, Bad Ideas, the World in Numbers
-
S3E14 - What Could Have Been, What It's Worth, Globetrotting
-
S3E13 - Now and Then, Identify This, Into the Wild
-
S3E12 - Myths, Record Breakers, Surprising Stats
-
S3E11 - Ridiculous Theories, Mystery Solved, Problem and Solution
-
S3E10 - Mad Science, Claim to Fame, Oddities
-
S3E09 - Globetrotting, Get Creative, Identify This!
-
S3E08 - What Might Have Been, Oddities, Myths
-
S3E07 - Supernatural, Bad Ideas, on the Menu
-
S3E06 - What's in a Name, Untold History, in Sickness & in Health
-
S3E05 - Globetrotting, Now and Then, What It's Worth
-
S3E04 - Mystery Solved, Problem & Solution, Record Breakers
-
S3E03 - Ridiculous Theories, Untold History, Origins
-
S3E02 - What's in a Name, Get Creative, Identify This
-
S3E01 - In Sickness & in Health, Fact or Fiction, Who Said That?
-
S2E18 - Origins, Untold History, Inventions
-
S2E17 - Mystery Solved, Globetrotting, on the Menu
-
S2E16 - Fact or Fiction, Oddities, Identify This
-
S2E15 - Record Breakers, Ridiculous Theories, in Sickness & in Health
-
S2E14 - Mad Science, Myths, Claim to Fame 2013
-
S2E13 - Origins, Supernatural, Bad Ideas
-
S2E12 - What Could Have Been, Get Creative, Identify This
-
S2E11 - Untold History, Globetrotting, Oddities
-
S2E10 - What's in a Name?, Now and Then, Myths
-
S2E09 - Problem and Solution, Who Said That?, Supernatural
-
S2E08 - Record Breakers, What It's Worth, in Sickness & in Health
-
S2E07 - Bad Ideas, Oddities, Mad Science
-
S2E06 - What Could Have Been, Conspiracies, Identify This
-
S2E05 - Untold History, Get Creative, Origins
-
S2E04 - What's in a Name?, Now and Then, on the Menu
-
S2E03 - Supernatural, in Sickness & in Health, Record Breakers
-
S2E02 - Mad Science, Myths, Who Said That?
-
S2E01 - What It's Worth, Problem & Solution, Globetrotting
-
S1E22 - Science, History, the Arts
-
S1E21 - Geography, Science, Health
-
S1E20 - Animals, History, People
-
S1E19 - Health, History, Science
-
S1E18 - Geography, Culture, History
-
S1E17 - Technology, Music, Travel
-
S1E16 - Science, People, Animals
-
S1E15 - Health, Food, History
-
S1E14 - Sports, Geography, Science
-
S1E13 - U.S. Capitals, Oceans, Dinosaurs
-
S1E12 - Medieval Times, Astronomy, Energy
-
S1E11 - U.S. Presidents, Chemistry, Performing Arts
-
S1E10 - Civil War, Business, Weather
-
S1E09 - Natural Histroy, Early Technologies, Food
-
S1E08 - Human Skeleton, Visual Art, American History
-
S1E07 - Explorers, Culture, Economics
-
S1E06 - Inventors, Agriculture, Mythology
-
S1E05 - Climate, Language, Health
-
S1E04 - Government, Sports, Music
-
S1E03 - Money, Plans, World Geography
-
S1E02 - Animals, Geography of North America, Math
-
S1E01 - History, Transportation, Astronomy
