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
S1E6 8.4
The Sky Is Falling

A U. F. O. has been spotted flying around the United States, terrifying people and violating every airspace regulation in the book. It falls into the sea, which, after another ship is destroyed investigating it, the Seaview is ordered to check it out.

#2
S1E10 8.4
Submarine Sunk Here

Chip Morton and Curley Jones are in New London making repairs on the diving bell's guidance system. At the same time a skirmish in the control room of the Seaview inadvertently allows it to move into a derelict mine field. The sub becomes entangled and attempts to free itself, but an explosion disables the sub and sends it to the bottom. With the crew running out of air the diving bell is their only hope.

#3
S4E24 8.4
Edge of Doom

Nelson is told the Seaview could be destroyed while carrying a top secret defense weapon but he has to determine if Captain Crane is an impostor.

#4 Doomsday S1E19 8.2
#5 The Day the World Ended S3E3 8.2
#6 Man of Many Faces S4E6 8.2
#7 The Lost Bomb S3E13 8.1
#8 The Condemned S1E31 7.9
#9 The Death Ship S2E22 7.9
#10 The Mechanical Man S2E25 7.9

Lowlights

#110 S4E15 Terrible Leprechaun 5.6

The Seaview is sent to stop a warhead on the ocean floor from detonating. But a leprechaun wants it to go off. So he tries to stop them. But his good twin brother tries to help them stop him.

#109 The Return of Blackbeard S4E14 6.5
#108 The Brand of the Beast S3E14 6.5
#107 The Shape of Doom S2E20 6.5
#106 Doomsday Island S3E23 6.6

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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