Episode Ratings Grid

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Episode Power Rankings

The peaks and the valleys. Find the essential episodes — and the ones to skip.

#1
S5E12 9.3
Episode #5.12

Featuring a female dinosaur expert who sells seashells down on the seashore, Brian the handsome scientist reveals the weird wonders of the Greek Universe, TV's fastest-talking pensioner, Bob Hale, tries to explain the Space Race between the USA and the USSR, and there's a fitting musical finale to the end of the series.

#2
S4E15 9.1
Scary Special

Death gets a good look around as he reveals his creepiest moments - a Tudor family show the extent of their ghostly superstitions and the Vikings demonstrate how to become truly terrifying to enemies.

#3
S5E14 9.1
Ridiculous Romance
#4 Song Special S5E13 9.0
#5 Frightful First World War S5E15 8.8
#6 Revolting Russian Revolutions S7E9 8.8
#7 Episode #4.12 S4E12 8.7
#8 Episode #5.6 S5E6 8.7
#9 Episode #4.10 S4E10 8.6
#10 Sport Special S4E14 8.6

Lowlights

#122 S9E1 British Black History 4.1

Horrible Histories charts the contribution of Black people to British life throughout history. How did African soldiers come to be guarding Hadrian’s Wall? Why was a West African diver asked to help salvage Henry VIII's ship, the Mary Rose? And the actor Ira Aldridge tells us how he came to leave New York to find fame in 19th-century England.

#121 NHS 75th Birthday Special S10E2 5.0
#120 Banging Bling S9E9 5.2
#119 Precious Planet S9E4 5.2
#118 Awesome Ancient Civilisations S7E14 5.6

The Quality Arc

Each point is an episode, plotted in order. Colored bands mark season boundaries. Look for the rise, the plateau, or the decline.

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Episode Engagement

High votes + high rating = beloved classic. High votes + low rating = notorious stinker. Low votes + high rating = hidden gem.

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Series Trajectory

One point per season. Smooths out the episode-to-episode noise to reveal the bigger arc.

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Season Momentum

Did each season build or fizzle? Green means the finale outscored the premiere. Red means the opposite. Longer arrows, bigger swings.

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Season Consistency

How steady is each season? Tightly clustered dots mean reliable quality. Scattered dots mean a wild ride.

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