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
S1E2 8.1
Cracking a Killer's Code: Part 2

As Susan and the other Bletchley women close in on the murderer of the five girls, a shocking discovery calls their theories into question and forces them to set a dangerous trap - a trap that puts one of them in even greater danger.

#2
S1E1 8.0
Cracking a Killer's Code: Part 1

When Susan Gray spots a hidden pattern in a series of murders, she tries to inform the police. But when they and her husband insist she forget her theory Susan enlists her wartime friends to try and track down the murderer.

#3
S1E3 7.9
Cracking a Killer's Code: Part 3

Thrown into a chilling confrontation with the murderer they have so brilliantly tracked down, Susan and the other Bletchley women become locked into a ever more dangerous game of cat and mouse that leads to a seemingly inescapable conclusion.

#4 Blood on Their Hands: Part 2 S2E2 7.8
#5 Uncustomed Goods: Part 2 S2E4 7.8
#6 Blood on Their Hands: Part 1 S2E1 7.7
#7 Uncustomed Goods: Part 1 S2E3 7.6

Lowlights

#7 S2E3 Uncustomed Goods: Part 1 7.6

Spirited Millie is earning a bit of money selling odds and ends on the black market. But Millie stumbles across a seam of post-Second World War unwholesomeness when she annoys some very dangerous people and gets into trouble. Soon, the other Bletchley girls must rally to her aid.

#6 Blood on Their Hands: Part 1 S2E1 7.7
#5 Uncustomed Goods: Part 2 S2E4 7.8
#4 Blood on Their Hands: Part 2 S2E2 7.8
#3 Cracking a Killer's Code: Part 3 S1E3 7.9

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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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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