Flowers of Death
E1
Cosmic Smoke Guns
E2
Lost in the Snow Cap Region of Mars
E3
Explosion on Morehouse Five
E4
The Evil Guardian of Harpola
E5
Hit by a Meteorite
E6
Planetoid Plot
E7
Victim of Amnesia
E8
The Lieutenant's Revenge
E9
The Mind Readers
E10
Slaves of the Exonium Mine
E11
Abandoned in Outer Space
E12
The Great Bank Robbery
E13
The Mysterious Moonquakes
E14
The Phantom Fleet
E15
Trouble on Titan
E16
Sacrifice to the Moon God
E17
Uncertain Death
E18
nvasion
E19
A Threat to the United Planets
E20
The Threat of the Thormanoids
E21
Jungle Jeopardy
E22
The Scheming Sibling
E23
Danger on Mars
E24
Mission to Mercury
E25
The Deadly Ray Gun
E26
The Force Barrier
E27
The Iron Fist
E28
The Derelict Space Station
E29
The Mystery of Ancient Egypt
E30
Mystery of the Pirate Ship
E31
Emergency Flight to Mercury
E32
Blackmail at Lake Azure
E33
The Hidden Map
E34
The Green Mold of Mars
E35
The Galaxtic War
E36
The Energy Thief
E37
Sabotage of the Jupiter Run
E38
The Star Raiders
E39
The Code Breakers
E40
Errand of Mercy
E41
The crew miscalculates, and instead of going back in time to 1952, they end up in Nazi Germany in 1942 in the middle of a world war.
Underwater Treachery
E42
The Electronic Man
E43
Treachery on Terra Five
E44
Frontier Epidemic
E45
Powerdive
E46
Three Exiles
E47
The Shakedown
E48
The Human Trap
E49
The Chase in Time
E50
The Deadly Sunbeam
E51
The Conspiracy
E52