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Season guide

Tom Corbett, Space Cadet: Season 3

28 episodes Premiered Dec 11, 1954
Previously on Tom Corbett, Space Cadet

Season 3 Lore Primer

Key plot threads, lore context, and character stakes you need to remember before diving into this season.

  • ⚡ Directly follows the overarching narrative developments of Tom Corbett, Space Cadet Season 2.
  • ⚡ Faction dynamics and core character alliances shift under escalating external stakes.
  • ⚡ Crucial mysteries introduced previously reach key turning points and narrative reckonings.
  • ⚡ Sets up serialized story arcs that build directly toward the climactic season finale.
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Season 3 Episodes

Episode Guide

🛡️ SPOILER SHIELD

Season 3 Progress Shield

Future titles & synopses blurred. Tap "Reveal" on any card to peek.
Binge Efficiency Engine

Season 3: Filler vs. Essential Canon

Filter episodes by narrative weight. Focus on essential mytharc and skip standalone side quests.

11%
89%
Mytharc (3): Crucial lore & season climaxes
Core (25): Character development & subplots
Side Quest (0): Standalone / filler
S3·E1 Mytharc

The Atomic Curtain

Dec 11, 1954

A radioactive beam pins two cadets behind an atomic curtain.

S3·E2 Core

Astro's Trial

Dec 18, 1954

Tom Corbett fights to clear his friend Astro of a negligence charge. Astro had given orders to a spaceship that somehow leads to its crash.

S3·E3 Core

The Runaway Asteroid

Jan 1, 1955

400 million miles from Earth, the cadets, Captain Strong and Commander Arkwright attempt to alter the course of an asteroid presently orbiting Jupiter. Their purpose: Find a way to

S3·E4 Core

Suit Up For Death

Jan 8, 1955

Major Bemus, the Space Academy Quartermaster, rejects the report that a defective feed line flutter valve for the oxygen tanks on Academy spacesuits is the cause of a series of acc

S3·E5 Core

Mystery of the Mothball Fleet

Jan 15, 1955

The Space Cadets are assigned to a tour of duty at the Solar Guard's fleet anchorage, when one of the crew members is reported dead.

S3·E6 Core

The Life Ray

Jan 22, 1955

Tom and his unit brave danger against the solar system in a desperate effort to restore the life ray.

S3·E7 Core

A Mighty Mite

Jan 29, 1955

Pint-size T. J. Thistle is discouraged because he thinks he can't measure up to the man-size duties of the Polaris crew. Then the ship springs a fuel leak.

S3·E8 Core

Ace of the Space Lanes

Feb 5, 1955

During a routine space run, T.J. Thistle and Astro are enthusiastically following by long-range televiewer, the attempt of Captain Cowan, famous Solar Guard rocket buster, to estab

S3·E9 Core

The Asteroid Station

Feb 12, 1955

A fault-finding reporter arrives to investigate the Solar Guards asteroid station. His newspaper originally opposed the building of the project.

S3·E10 Core

The Grapes of Ganymede

Feb 19, 1955

Tom Corbett and his shipmates try to find the source of the contaminated grapes which are causing radiation sickness throughout the colonies of the solar alliance.

S3·E11 Core

Assignment: Mercury

Feb 26, 1955

On a trip to Mercury, the cadets are assigned to Major Connel, the roughest, toughest, meanest officer in the entire Solar Guard. This is much to the chagrin of T.J., who starts of

S3·E12 Core

Smugglers of Death

Mar 5, 1955

The Space Cadets try to stop smugglers from sending supplies of hyperionite, a crystal that speeds up the breakdown of ores from space to Earth.

S3·E13 Core

The Mystery of the Missing Mail Ship

Mar 12, 1955

A former Solar guard Captain hijacks the Titan Mail Ship in revenge for his being dishonorably discharged from the Space Academy. Roy Cowan, the former "Ace of the Space Lanes" (se

S3·E14 Core

The Gremlin of Space

Mar 19, 1955

The Polaris Cadets are in trouble for an accumulation of minor infractions so for a period of 31 days they are assigned to what is supposed to be a tedious Cargo detail as punishme

S3·E15 Core

Terror in Space

Mar 26, 1955

An accident on board the Polaris cuts Astro adrift from the ship, and he floats in a panic, through the blackness of space. Tom and T.J. must rescue him and calm his fears. Psychol

S3·E16 Core

Spaceship of Danger

Apr 2, 1955

The Space Cadets board a spaceship to return from a vacation. Little do they know that its Captain plans to abandon ship and collect the insurance covering its loss.

S3·E17 Core

The Magnetic Asteroid

Apr 9, 1955

A strange asteroid having an exceptionally strong magnetic field, along with the magnetic personality of one, T.J. Thistle, combine to wreak a hit of havoc in space. Tom warns T. J

S3·E18 Core

Danger in the Asteroid Belt

Apr 16, 1955

Tom Corbett and his buddies are trapped aboard a training ship on its test flight. The ship is supposed to pass through the asteroid belt.

S3·E19 Core

False Alert

Apr 23, 1955

A false distress alert from outer space sends Tom Corbett and the crew of the Polaris rocketing into an almost certain death trap.

S3·E20 Core

The Space Projectile

Apr 30, 1955

The Polaris Cadets, Captain Strong, and a very obnoxious Cadet Monroe, are assigned to retrieve data from a robot rocket referred to as the "Deep Space Projectile", in the vicinity

S3·E21 Core

The Outpost of Terror

May 7, 1955

Tom, Astro, and T.J. make a stop at an outpost on Triton, the largest satellite of the planet Neptune. The first thing they discover at, the outpost is a corpse. The unfortunate vi

S3·E22 Core

Exercise for Death

May 14, 1955

Secretary Masters, the top Man in the Solar Guard, pays a visit to Space Academy and receives an unfavorable first impression of the Polaris Cadets. Later, as a part of an exercise

S3·E23 Core

Ambush in Space

May 21, 1955

Roy Cowan, a former solar guard Captain, escapes from the Asteroid Prison and sets out to ambush the Polaris. His aim: to destroy Tom Corbett and his crew mates who twice before fo

S3·E24 Core

The Stowaway

May 28, 1955

The young daughter of the Defense Minister stows away aboard the Polaris. She causes trouble for Tom and the crew who are headed for Titan to field test a new reactor.

S3·E25 Core

A Fight for Survival (Assignment:Survival)

Jun 4, 1955

Tom, Astro, and T.J. are assigned to fly an old ship to Venusport, where it is to be scrapped. But as the Cadets are descending toward Venus, the ship's reactors malfunction, sendi

S3·E26 Core

Space Blindness

Jun 11, 1955

Tom Corbett, Astro and T. J. Thistle aboard the Polaris, accompany a scout ship manned by Commander Arkwright, and Professor Hinkel on a flight into outer space. Professor Hinkel i

S3·E27 Mytharc

Comet of Danger

Jun 18, 1955

A photographer goes along on a Polaris expedition into space. He insists that the ship pass through a speeding comet. The result is disastrous!

S3·E28 Mytharc

The Final Test

Jun 25, 1955

Tom and his crew mates take their final exams at the Space Academy. One of the tests includes a dangerous flight into deep space.

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