Principal photography on the film began on November 21, 2015, under the working title Nightingale. Among the film sets were Lower Halstow, Kent, and Australia House in England and the Sassi di Matera, Castel del Monte and Camerota in Southern Italy. Matthew Jensen was the director of photography, filming in the United Kingdom, France and Italy. Production in London concluded on March 13, 2016. On March 20, 2016, filming was underway in Italy. In late April, filming took place at the Louvre Museum in Paris, France, where a Wayne Enterprises truck was spotted alongside Gadot. Principal photography finished on May 9, 2016. Patty Jenkins and director of photography Matt Jensen said that the film's look was inspired by painter John Singer Sargent. Reshoots took place in November 2016, while Gadot was five months pregnant. A green cloth was placed over her stomach to edit out her pregnancy during post-production.
Ares told Diana that he had been imprisoned by the other Gods of Olympus and bound in chains that were secured by Aphrodite through the power of her love. He also told her that years ago, Phobos and Deimos had implanted false memories of Themyscira into her mind, and these had caused her to imagine aspects of her past that had never happened in reality. Meanwhile, Phobos and Deimos entered Themyscira and battled with the Amazons. Diana knew what she had to do, and called Ares to unite her with Phobos and Deimos. He teleported them to her, and using her Lasso of Truth, Wonder Woman bound them through the power of her unconditional love for them, as Aphrodite had done to Ares. With the twin gods defeated, Diana attempted to leave Ares' prison along with Veronica and Izzy, however Izzy's essence had been attached to the realm and could not return to Earth. Izzy was forced to either live out the rest of her days in the prison or live in Themyscira as an Amazon for eternity. She chose the latter and Veronica said goodbye to her daughter. Diana was briefly reunited with her mother, for the first time since she left the island.
In one episode, a newspaper editor named Brown, desperate to discover Wonder Woman’s past, assigns a team of reporters to chase her down; she easily escapes them. Brown, gone half mad, is committed to a hospital. Wonder Woman disguises herself as a nurse and brings him a scroll. “This parchment seems to be the history of that girl you call ‘Wonder Woman’!” she tells him. “A strange, veiled woman left it with me.” Brown leaps out of bed and races back to the city desk, where he cries out, parchment in hand, “Stop the presses! I’ve got the history of Wonder Woman!” But Wonder Woman’s secret history isn’t written on parchment. Instead, it lies buried in boxes and cabinets and drawers, in thousands of documents, housed in libraries, archives and collections spread all over the United States, including the private papers of creator Marston—papers that, before I saw them, had never before been seen by anyone outside of Marston’s family.