Steve must stop a group of government conspirators who have assembled an atomic bomb from stolen parts.
While experimenting with a serum that aids in the awakening from a cryogenic sleep, scientist David Tate is accidentally injected with too much serum. When the space capsule in which he was experimenting crashes, he begins terrorizing the countryside and Steve must hunt him down.
When an accident causes Steve temporary blindness and the plane he is on, which is carrying a Senator and his aides crash lands in the desert, he must lead them to safety.
When the Prime Minister of a small country has a heart attack while negotiating peace amongst it's surrounding neighbors, she is selected to received the first bionic heart. Steve is assigned to protect her while she is transported to the secret hospital where the procedure will take place.
When Steve discovers that another bionic man exists, he is assigned to help him adjust to his bionics.
When an alien ship crashes, there is only one survivor. Steve helps the alien return to her mother ship, while the sheriff tries to capture her.
When Oscar disappears, Steve investigates following a lead involving a government operated gold mine.
Steve attempts to re-test the experimental plane that caused his near fatal accident. When suspicious things begin happening, Oscar reveals to Steve that his first crash might not have been an accident. Steve chooses to proceed with the experiments hoping to lure the saboteurs into the open.
While Steve is helping a science team place earthquake sensors on the ocean floor, their boat is notified that neighboring Santa Ventura has broken off diplomatic relations with the US. Before their boat can leave the area they are captured by a patrol boat.
Steve gets amnesia when his plane crashes in the mountains. Steve is caught in the middle of a local dispute, when a local woman helps him.
When Steve jumps a 12 foot fence to fix a malfunctioning space capsule, a newswoman happens to get it on film. After her boss sees the footage he attempts to kidnap Steve so he can sell him to a foreign country.
Steve is assigned to protect Liza Leitman, an equestrian trying to make the olympic team; also the creator of the cryptography code that links computers and secret communications world-wide.
Steve consoles a woman whom he was once romantically involved, when her husband apparently dies in a plane crash.
When a plane carrying an atomic warhead crashes on a south pacific island, Steve is sent to retreive it. He finds that an ex-Japanese zero pilot has taken it to his home. Steve must successfully navigate his way through the booby-traps and get the warhead before a rogue gorrilla group does.
Doctor Dolenz returns and kidnaps Oscar, replacing him with a look-a-like robot in an attempt to steal the formula for a new energy source.
The last known golden cougar is on the verge of being hunted down by local ranchers trying to stop their livestock from being killed. Steve's friend and local ranger asks him for help to save the cougar from extinction.
While Steve's away on vacation, a man who has been surgically altered to resemble Steve, goes into Oscar's office and photographs every classified material there is. Someone tries to kill Steve but Steve evades them. Steve returns just as Oscar and the false Steve are leaving a secret facility, which he photographed. The imposter tries to run away but is run over by a car. Steve then decides to assume his identity so that he can recover what he photographed.
When Oscar discovers that the construction of a top secret laser is being duplicated, he suspects Harry Green, the expert overseeing the project, is a traitor. Steve believes that he is not a traitor, but that his thoughts are being monitored through ESP. He obtains the help of Audrey Moss, also gifted with ESP, to track down the ESP spy.
With Jaime adjusting to her bionics, Oscar wants to use Jaime to infiltrate a counterfit ring and steal the counterfit plates lock in their vault. Steve is adamantly opposed, but Jaime's bionic hearing is the only way to successfully open it the vault. Jaime's body seems to be rejecting her bionics, but does not tell anyone. After the mission the rejection worsens and leads her to run aimlessly. Steve tracts her down and brings her to Rudy, but there is nothing he can do and Jaime dies.
When Steve returns to his hometown, he runs into Jaime Sommers, his former girlfriend. The romance is rekindled and they quickly get enganged. While the two are skydiving, Jaime's parachute gets tangled and has a near fatal accident. To help save her life and another chance at a normal life, Steve pleads with Oscar to let Rudy operate on her and give her bionics.
Revolutionaries kidnap the wife of the US Ambassador to the nation of Balinderry. In exchange for her release the revolutionaries want the fellow revolutionaries that are imprisoned to be freed. With the help of Julia Flood, his liason with the kidnappers, Steve attempts to rescue the ambassador's wife.
Steve is arrested when an assassin he helped send to prison seeks revenge by framing him for murder. Steve escapes from the police and must find the assassin before the police find him.
