At the end of the 1960s, under the guidance of Mike Sekowsky, Wonder Woman surrendered her powers in order to remain in Man's World rather than accompany her fellow Amazons to another dimension. Wonder Woman begins using the alias Diana Prince and opens a mod boutique. She acquires a Chinese mentor named I Ching, who teaches Diana martial arts and weapons skills. Using her fighting skill instead of her powers, Diana engaged in adventures that encompassed a variety of genres, from espionage to mythology. This phase of her story was directly influenced by the British spy thriller The Avengers and Diana Rigg's portrayal of Emma Peel.
As early as the 1950s, Wonder Woman's tiara has also been used as a razor-edged throwing weapon, returning to her like a boomerang. The tiara allows Wonder Woman to be invulnerable from telepathic attacks, as well as allowing her to telepathically contact people such as the Amazons back on Themyscira using the power of the red star ruby in its center.
Shortly thereafter, Wonder Woman is shown being able to summon it with her tiara, have it hover by the War Department, and extend from it a rope ladder with which she could board it. She uses the plane to fly into outer space, and frequently transports Etta Candy and the Holliday Girls, Steve Trevor, and others. During the 1950s, the plane becomes a jet, and is often shown swooping over Lt. Prince's office; she strips out of her uniform at super speed and bounds to the plane. Though the Plane was depicted as semi-transparent for the reader's convenience, in-story dialogue indicated that it actually was completely invisible, or at least able to become so as the need arose.
While Superman watched out for Zod, Diana visited the deserted Themyscira to speak to her mother, still a clay statue. In her absence, a demon from Tartarus had escaped from its prison and roamed free on the island. Wonder Woman destroyed the creature and sealed the gates to Tartarus with her lasso. Leaving the island, she received word from Batman that Superman was engaging Zod and Faora in battle. Reaching Superman’s side, Wonder Woman steadily overwhelmed Faora until Zod threatened Superman’s life. Wonder Woman was forced to let the criminals go.
Hermes Action Comics #267 (August 1960) Hermes is the Messenger of the Gods, and the God of Thievery, Speed, Travel, and Commerce who is based on the god of the same name. Post-Crisis, Hermes was one of Wonder Woman's earliest allies. He was eventually killed by Circe during the War of the Gods, but Wonder Woman freed him much later from Tartarus. In the New 52, the bird-like Hermes was a close ally to Wonder Woman and aided in protecting Zeke, the reincarnation of Zeus. Post-Rebirth, Hermes took the form of a tortoise and aided Wonder Woman alongside several other gods.