Steve Austin goes undercover as a longshoreman to investigate the disappearance of another OSI agent.

When Oscar assigns Steve Austin to protect the priceless Golden Pharaoh statue, they find it has already been replaced by a fake.

Atomic bomb components have been stolen over a series of thefts and Oscar suspects one old cop, Officer Banner of being involved.

When Steve Austin agrees to some promotional work for a friends' Big Brothers organization, he soon takes a difficult youth named Carlos Delgado under his wing.

Steve poses as a member of the US team in a sailplane meet to stop terrorists.

A boy experimenting with chemicals accidentally stumbles onto a thermonuclear reaction, creating a dangerous and powerful power source. A corrupt fire chief and some unscrupulous investors are out to discover the formula and it's up to Steve Austin and the boy to stop them.

Steve is on a mission involving a test satellite. But Steve becomes a target when the satellite is needed to gain control of a missile to be sold to a foreign power.

The daughter of Steve's friend, David McGrath, is kidnapped in order to force David to kill Steve. When the attempt on Steve fails, David confesses to Steve who then must rescue her.

Steve is sent to the moon to investigate an orbital shift which is causing major upheavals in the Earth's climate. It turns out the upheavals are caused by a deranged scientist working at an exploration post on a nearby asteroid.

Steve is captured on the moon and is forced to help the scientist, who believes he's found a new energy source, and who threatens nuclear devastation on Earth if Steve refuses.

While searching for a fallen satellite in the Pacific, Steve rescues a drowning victim who turns out to be an alien. She offers to help him acquire the satellite, which has landed on her race's invisible island. However, many of the island's populace in fear of a revolution, yet are unable to leave due to a lack of an immune system to Earth illnesses. Steve must get an experimental serum for her before she will help him.