S2E4 Chapter IV
Graham learns of a stone-shaping technique now lost to history, and explores how ancient Amazonians managed to thrive in an inhospitable rainforest.
Episode Ratings Grid
Every episode at a glance, color-coded by rating. Rows are episode numbers within each season, columns are seasons.
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See AllEpisode Power Rankings
The best and worst episodes at a glance. Use this to find must-watch episodes or ones you might want to skip.
🏆 Top Episodes
#2
S2E6
Chapter VI
At Mexico's Temple of the Sun, Graham experiences the extent of the Mayans' astronomical expertise and investigates their complex calendar system.
#3
S2E2
Chapter II
Graham searches for answers to the questions behind ancient works of art, including 25,000-year-old Amazonian paintings and the megaliths of Rapa Nui.
- 4. S2E3 "Chapter III"
- 5. S2E1 "Chapter I"
- 6. S2E5 "Chapter V"
- 7. S1E5 "Legacy of the Sages"
- 8. S1E7 "A Fatal Winter"
- 9. S1E8 "Cataclysm and Rebirth"
- 10. S1E3 "Sirius Rising"
📉 Bottom Episodes
#14
S1E2
Survivor in a Time of Chaos
In Cholula, Mexico's oldest continuously-inhabited city, the journalist inspects the world's largest pyramid for signs of a forgotten past.
- 13. S1E1 "Once There Was a Flood"
- 12. S1E4 "Ghosts of a Drowned World"
- 11. S1E6 "America's Lost Civilization"
- 10. S1E3 "Sirius Rising"
The Quality Arc
Each point is an episode, plotted chronologically. The colored bands mark season boundaries. Look for upward or downward trends to see if quality improved or declined over time.
Episode Engagement
Vote count shows how many people cared enough to rate. High votes + high rating = beloved classic. High votes + low rating = notorious stinker. Low votes + high rating = hidden gem.
Rating threshold:
4 Standouts
4 Infamous
6 Hidden Gems
0 Forgettable
Top Standout: S1E5 Legacy of the Sages
Most Infamous: S1E1 Once There Was a Flood
Best Hidden Gem: S2E4 Chapter IV
Episodes plotted by rating vs. vote count. The vertical line marks the rating threshold (7.5). More votes = more engagement. Toggle above to compare against global or show-specific median.
Season Momentum
Did each season build momentum or fizzle out? Green arrows mean the finale rated higher than the premiere. Red means the opposite. Longer arrows = bigger swings.
Season Consistency
Some seasons are reliable bangers. Others are hit-or-miss. Each dot is an episode. Tightly clustered dots mean consistent quality. Scattered dots mean a mixed bag.
Each dot is an episode. Clustered dots = consistent quality. Scattered dots = variable season. Hover for episode details.