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McCauley and team make it successfully to Phobos. However, their scientist, obsessed with getting observations, disappears a few minutes before they need to depart due to a fuel leak. McCauley must find him and bring him back or risk both of them becoming stranded.
Col. Frank Bartlett loses his life trying to track down a mysterious object that is pursuing American spacecraft. McCauley vows to find the object and determine what it is and what its intent is.
Col. McCauley is dispatched to England to advise the British on their own space program. Only they don't heed his warnings about their rocket design and when it launches, the ship malfunctions, hurling the craft and crew into a soon-to-be-fatal orbit. McCauley and a green British astronaut must quickly try a daring rescue before it's too late for the trapped crew.moreless
Bob King is a former pilot with the U.S. Air Force who has lost his nerve, but is forced to regain his confidence when Col. McCauley gets in trouble and needs rescuing.
Russia blames the U.S. for sabotaging a spaceship, even though it apparently was a mistake made by Major Kralenko of the Russian space fleet.
McCauley must rescue a ship commander and his passenger after the commander is forced to land in an isolated section of the Moon with only two hours of oxygen remaining.
The race to reach Mars is on between the Russians and the Americans and Capt. Jim Nicholls is ready to be the first to go.
McCauley and two officers travel to the far side of the moon to monitor radio signals from outer space. When one of them is badly injured and his condition is too critical to risk a spaceflight, the two remaining men must work out what to do next.
McCauley is sent on a mission to find and rescue the crew of MR-28, a spaceship that has gone out of control, and which also carries Colonel Benson's son.
Col. McCauley returns from exploring an asteroid and claims that while there he found a fossil. His proclamation is met with skepticism and he's told he is experiencing a case of space fatigue.
A physician comes to Space Station Astra with equipment to show where man's ability to overcome ends. But Astra is soon endangered and McCauley will have to overcome his limits if he hopes to save his crew.
Col. McCauley is left with a mystery when a space helmet is found in a part of the moon that has not yet been explored by man.
McCauley's friend, scientist Guthrie Durlock, disobeys orders and puts the colonel in danger. However, the two men are forced to work together when Guthrie insists on recovering an out-of-control Venus probe containing valuable data.
While two scientists look for nuclear fuel on the moon, they find evidence of what can only be explained as a "moon monster."
When a rocket is hit by what is thought to be a meteor, analysis of the debris proves that it refined metal. As McCauley prepares to lead an expedition to recover more of the debris, the three crewmen on the original expedition begin dying in inexplicable accidents.
Col. McCauley is aboard Space Station Astra supervising a scientist's analysis of the Venus probe results when he receives word that his son Pete was injured in ahit-and-run accident... and the driver is aboard Astra.
When it comes time to chose the crew for a special observatory flight to the sun, a conflict arises over the fact that a possible choice could be a female, and some of the men don't feel that a woman is up to the task.
When a valuable rock specimen found on a previous mission is smuggled to Earth and sold, McCauley takes the four scientists from the mission back to the moon to trick the thief into revealing the hidden deposit he gathered the specimen from.
A scientist's jealousy toward his intellectually superior friend and co-worker complicates Col. McCauley's mission to confirm the presence of radioactive materials on the moon.
Col. McCauley not only has to deal with newsmen on the moon for the first time, but needs information they've uncovered not to be printed.
Dr. Rowland Kennedy journeys to the moon to prove his theory that ice has collected in deep caverns, ice that can be used to provide water for colonists. But McCauley soon realizes that the scientist is keeping a secret that is driving him to dangerous obsession.
An ambitious young electrical technician wants to go into space so much that he hides in McCauley's rocket ship. However, when his extra weight causes an electrical burnout and endangers the ship, he has no choice but to go outside and aid in the ship's repairs.
While transporting two prominent scientists to the moon base, Col. McCauley's ship crashes. The group is miles away from the station and their oxygen tanks have been damaged. For three of them to make it, one man must consider sacrificing himself.
Colonel McCauley pushes a young astronaut cadet to his limit during training. When McCauley is rendered unconscious it's up to the cadet to land the ship on Earth.
Inflight refueling is a tricky and dangerous endeavor, so to handle the procedure, Col. McCauley decides to recruit two hotshot pilots who also happen to be brothers.
McCauley has to deal with two scientists aboard Space Station Astra who can't get along with each other. Neither one will compromise, but they soon have to cooperate when a viral outbreak condemns one man to a slow, agonizing death unless the other scientist can find a cure.
When the moon passes through a comet's trail, McCauley takes two astronomers, Oliver Farrar and Jim Nichols, to a lunar observation post to watch the phenomena. But when Farrar is stricken with appendicitis, McCauley must go to get the doctor, and Nichols, an atheist, now begins to pray for a miracle that will save his friend.moreless
Things are about to change when Renza Hale brings a woman's touch from the Earth to the Moon.
The development of a new metal alloy looks promising for use in the construction of future re-entry vehicles. However, when the alloy seemingly fails during a re-entry test, the pilot ejects and his decision comes under fire.
An emergency develops when Col. McCauley's space ship is struck by a meteor, rendering its reserve oxygen supply useless.
Col. McCauley takes a crew to investigate the asteroid Skyra, which has moved into geosynchronous orbit around the Earth. If it is suitable, McCauley hopes to build a space station on it.
Colonel McCauley takes on the mission of finding the missing space craft MR127 and its crew after all communication is suddenly lost during its return flight from the Moon back to Earth.
During a moon expedition, McCauley's communication officer Tom Farrow is distracted when he learns that his wife was in a car accident. Troubles arise when a moonquake topples their ship, damaging the radio and preventing any hope of rescue unless Tom canreestablish contact with Ground Control.
A runaway unmanned rocket must be either diverted or destroyed before it crashes into the moon, contaminating the lunar surface and killing the team that is there.
During the initial stages of building the base on the Moon, one of Colonel McCauley's crew suffers a coronary thrombosis and must be taken back to Earth...even though it's unlikely he'll survive the acceleration required to lift off.
Colonel McCauley races against time in order to save an astronaut who becomes trapped when assembling the pre-fabricated units of a space station. The astronaut gets snagged when one of his sleeves catches between sections of the station.
Senator Jim Sloane of the President's Space Committee arrives to question the value of the Air Force's moon landing program. Once the senator is satisfied, McCauley and his crew depart for the moon and make a successful landing, but discover that one of their number was seriously injured during takeoff.
As his family watches from Mission Control, Col. Edward McCauley commands the first rocket into outer space and must take a desperate gamble when the second stage of his rocket fails to jettison.