Princess Diana (Lynda Carter) volunteers to return Steve Trevor (Lyle Waggoner) to Washington, D.C. after he crashes his airplane on Paradise Island and remained in coma. Upon arriving in Washington D.C., she establishes the secret identity of Diana Prince and begins working for Steve Trevor. This movie, and the First Season, are set in World War II.

Steve is being framed for several incidents of sabotage. He suspects Baroness Paula von Gunther (Christine Belford) an imprisoned Nazi spy. The warden's son Tommy, an avid fan of detective fiction, assists Wonder Woman. Having discovered the Baroness' hideout, Wonder Woman is surprised by the Baroness. She hits Wonder Woman in the face with knock-out gas and Wonder Woman faints. Later she recovers and after a struggle brings the Baroness to justice.

Fausta Grables (Lynda Day George) lures Wonder Woman into a trap. Wonder Woman falls through a false floor where one of Fausta's gang overpowers her with chloroform causing Wonder Woman to faint. The unconscious Wonder Woman is then kidnapped and taken to Germany for study. Steve launches a mission to rescue her but is captured himself shortly after Wonder Woman orchestrates her own escape. Wonder Woman returns to Germany to rescue Steve and convince Fausta to abandon the Nazi cause.

Diana enters a beauty contest to expose a sabotage ring of radar scanning equipment, which is led by the pageant's musical director. Guest stars:Anne Francis and Dick Van Patten.

The United States Army is about to unveil its first jet fighter and the Nazis are determined to steal the plane and study it to build a jet fighter of their own. Meanwhile, Diana's younger sister Drusilla (Debra Winger) arrives from Paradise Island for a visit and gets caught up in the Nazis' plot. Kriegsmarine Captain Radl (John Saxon) also wants to find out the source of feminum, the metal used to make Wonder Woman's bracelets. He kidnaps General Blankenship, who is taking Drusilla for a drive in Washington. Drusilla discovers that she can spin into costume like her sister and turns into Wonder Girl. Wonder Girl tries to rescue the General but Captain Radl chloroforms her.

Erica Belgard (Gretchen Corbett), an animal behaviour specialist and Nazi agent, abducts a super-strong gorilla named Gargantua from his jungle home in order to recapture a defecting Nazi agent (John Hillerman) who is in American custody. Erica decides to use the gorilla's strength to defeat and capture Wonder Woman. Also guest stars Robert Loggia as Hans Eichler.

Wonder Woman and Steve investigate a Nazi plot to flood the American economy with counterfeit $2 bills in order to destabilize the American war effort. The Nazis hatch a long-range plot taking several months to implement, as plastic surgery and vocal training is used to transform two Nazi agents into the bureau chief of the Bureau of Engraving and Printing and his fiancée, a waitress and restaurant owner. Guest starring Barbara Anderson.

Wonder Woman journeys to Germany to rescue Andros. After seeing that she is prepared to sacrifice her life to save him, and when Steve Trevor demonstrates that the Allied cause is just, the aliens relent on their threat to destroy the planet. Andros invites Wonder Woman to accompany him in space, but she replies that she is needed on Earth. Andros promises to return to see her in 50 years (in 1992).

Wonder Woman journeys to Texas where Nazi agents are rustling cattle being raised for the American government. The cattle rancher (Roy Rogers) and his several adopted orphan kids try to assist Wonder Woman in her efforts to stop the Nazis. Wonder Woman's magic belt is stolen by the rustlers, who lock her in an abandoned jail cell, and the orphan kids retrieve her belt and come to her rescue.

Wonder Woman and Wonder Girl work together to stop a Nazi agent turned film producer from taking Steve and several other soldiers back to Germany to put them in a propaganda film that will destroy America's image as a peace-loving country. Guest starring Debra Winger, Christopher Norris, Robert Hays, Harris Yulin, and Carolyn Jones.

More than 30 years after her adventures during World War II, Princess Diana resumes the mantle of Wonder Woman when a plane carrying Steve Trevor Jr. (son of her former associate) lands on Paradise Island. Wonder Woman and Steve must prevent a terrorist from stealing a nuclear power plant and destabilizing all of Latin America.

Wonder Woman must stop Nazi war criminals from establishing the Fourth Reich led by a clone of Adolf Hitler.

A Japanese American man who had been in an internment camp during World War II blames Wonder Woman for the death there of his brother. He has developed telekinetic powers and uses them to try to exact revenge on Wonder Woman.

Wonder Woman must decide between conflicting loyalties. If she does her duty as Diana Prince, she will put Paradise Island in danger of becoming a nuclear testing site. This is first episode with no direct references to events of World War II.

Diana goes undercover with agent Christian Harrison as a married couple at a spa to investigate leaks of classified information. Diana transforms into Wonder Woman and discovers that an evil masseur is manipulating more than just spines, using his skills to entrance the wives of government officials into revealing secrets. However, on entering a spa, the room fills with knock-out gas and Wonder Woman faints! When she awakens, Wonder Woman is laid on a table and is subjected to a massage from the villain. Academy Award winner Celeste Holm guest stars.

Diana races against teams of Soviet and Chinese agents to stop Arthur Chapman (Roddy McDowall), an evil scientist who has the ability to cause volcanoes to erupt.

Wonder Woman and Andros continue to battle the Skrill, who are even more dangerous now that they have deduced Wonder Woman's secret identity and have captured Andros' mind.

An android double of Wonder Woman is built by a toymaker (Frank Gorshin). When she investigates, Diana Prince is injected by a toy butterfly and faints. Later she recovers and transforms into Wonder Woman, however she is confronted by the android and Wonder Woman is knocked unconscious.

Diana Prince goes undercover as a burglar to infiltrate a burglary ring.

The ruler (Henry Gibson) of a micronation kidnaps top athletes to force them to compete for his country in the Olympics.

Wonder Woman goes up against a magician who has discovered a way to turn lead into gold. Guest-starring Ed Begley, Jr.

Diana is assigned to protect an industrialist from an assassination attempt.

Wonder Woman takes on a man named Bernard Havitol (Ross Martin) who is looking to acquire the memories of the best computers in the world and is looking at IRAC for his next addition.

Wonder Woman poses as a photographer to protect an Air Force test flight from sabotage.

A boy (Todd Lookinland) with astonishing psychic ability is being exploited by his aunt and uncle who have been paid to extort world leaders into continuing a bloody war.

Bad guys impersonate the entire populace of a small town as part of a plot to steal a missile that can be guided by thought. When Wonder Woman finds the gang, she is gassed and faints, being taken prisoner.

A teenage boy, who is a pop star, is kidnapped and no one but Diana believes the only witness, a young fan (Dawn Lyn). The star's manager discovers and substitutes his long-lost identical twin brother to perform a concert, while Wonder Woman rescues the pop star. Leif Garrett guest stars in a dual role.

College football players are being manipulated into throwing their games and Wonder Woman must figure out who is behind the evil plot.

Wonder Woman investigates a series of robberies that lead her to a faux artist (Roddy McDowall) who uses a device to turn people into living statues to help him commit his crimes. Wonder Woman falls into a trap, is turned into a statue and is exhibited at a museum.

A telepathic disco dancer is using his powers to steal information from government scientists visiting a Washington D.C. hot spot. Diana must enlist the aid of a second telepath to foil the scheme.

An environmentalist chemist (Lorene Yarnell) is determined to stop a pesticide manufacturer from marketing its latest formula. She creates a formula that gives her superhuman strength and the ability to control ants. Wonder Woman must stop her before she causes a disaster that will release clouds of toxic gas over the city.

An unethical scientist (Joan Van Ark) threatens to destroy history when she travels back in time from the 22nd Century (November 10, 2155) with plans to accumulate great wealth in the 20th. Her fellow scientist (Ted Shackelford) teams with Wonder Woman to save the timeline.

A teenage skateboarder is manipulated into helping an extortionist win at illegal gambling. Eric Braeden guest star.

A woman dressed as Wonder Woman ends up in the hospital after wearing her costume in public. After a failed attempt on the impostor's life, Diana beefs up security, which causes them to catch a friend who reveals that the fake Wonder Woman is a model. Her modeling agency is up to no good and hire yet another girl to be Wonder Woman. Diana must stop their plans to steal millions from the rich.

The race is on to find a hidden laser crystal at a science fiction convention.

Wonder Woman must find out the truth behind a supposed alien landing before serious consequences occur as a result. She finds the hideout of the people faking the alien invasion but is captured, bound and gagged. A time bomb is set to kill her, but she is saved by a young man searching for his camera. Diana exposes the fake alien invasion and saves the day.

Going undercover to stop extortionists in the record industry gives Diana a chance to show off her vocal abilities.

A teenage boy has discovered Wonder Woman's secret identity after she has come to investigate strange happenings in his town. However, things are not what they appear as the aliens taking over the local citizens are actually hunting down a galactic terror, which leads to a confrontation between Wonder Woman and alien shapeshifter. Wonder Woman uses her magic lasso to make Skip forget her secret but he rediscovers the fact later when he listens to his recorded memos to himself.

On her first day in Los Angeles, Diana encounters an indestructible chimpanzee. This leads her to a scientist who through a combination of chemicals and radiation has also made a man, Bryce Candall, indestructible. Bryce and Wonder Woman join forces to foil the scientist's plan to create an army of indestructible men to take over the country.

Notes: Wonder Woman again exhibits superhuman hearing. In this episode, the final one in production order, Diana Prince relocates permanently to Los Angeles. Steve Trevor does not appear, and would have been permanently written-out if the show had continued for a 4th season. This was the last episode to be produced for the series, but was shown out of sequence. Wonder Woman wears her red-white-and-blue, star-spangled cape.

Searching for the leader of a foreign spy ring, Wonder Woman goes to a Washington amusement park where she encounters a disfigured veteran (Jared Martin in a dual role) who lives under the roller coaster and 'haunts' the park as its 'phantom.' Ike Eisenmann guest stars as Randy, an orphan boy.