The final installment of “Allen v. Farrow,” an HBO documentary series examining Dylan Farrow’s sexual abuse allegations against her adopted father, Woody Allen, covers the years from 1993, when a state’s attorney declined to prosecute the filmmaker, to the present.

The previous three episodes explored what Ms. Farrow says happened on Aug. 4, 1992, when she was 7 years old — that her father sexually assaulted her in the attic of the family’s Connecticut country home. The filmmakers combed through police and court documents, scrutinized the integrity of the investigations into her accusation and sought expert analysis of video footage of young Dylan telling her mother what happened.

“riddled with falsehoods.”

Hollywood to be associated with him after the #MeToo Movement.

The prosecutor’s decision

The episode begins on Sept. 24, 1993. That day, Frank Maco, a Connecticut state’s attorney, announced that although he had “probable cause” to prosecute Mr. Allen, he had decided he would not press charges to spare Ms. Farrow the potential trauma of a trial.

Mr. Maco, who was interviewed extensively for the documentary, says that earlier that month in 1993, he had met with young Dylan in his office, with toys in the room and a female state trooper there. When Mr. Maco asked about her father, he said, she froze up and would not respond.

“The strongest proponents for prosecution just looked at me, and we all shrugged our shoulders,” Mr. Maco said. “We weren’t going anywhere with this child.”

appeared in The New York Times columnist Nicholas Kristof’s blog. (Mr. Farrow, who helped his sister publish the open letter, said that after another newspaper declined to print the account, he took it to Mr. Kristof, a family friend.) Mr. Allen later published an Op-Ed in The Times denying his daughter’s allegations.

For two decades, Ms. Farrow says, she felt isolated and alone because of her experience. After publishing her letter, she received an outpouring of messages from people she knew sharing their own experiences with sexual abuse.

Loyalty to Mr. Allen

Still, many Hollywood actors remained loyal to Mr. Allen despite the accusations, and his star power and industry reputation remained mostly intact.

Four days after Ms. Farrow’s letter was published, her brother Moses Farrow told People Magazine that she was never molested. He also said that Mia Farrow coached the children to hate Mr. Allen and that she often hit him as a child. When Dylan Farrow learned what her brother said, she burst into tears, saying, “It was like I had been told that this person that I knew and loved and trusted was gone.”

In interviews with the filmmakers, Ronan Farrow along with two more siblings, Fletcher Previn and Daisy Previn, say that the abuse allegations against their mother were untrue.

In 2018, Moses Farrow followed up with a blog post that continued to dispute his sister’s account of sexual abuse. He targeted a specific detail of her story, which she had included in The Times letter: that while Mr. Allen sexually assaulted her, she remembers focusing on her brother’s electric train set, which had been traveling in circles around the attic. Mr. Farrow said that there was no electric train set in the attic. In Mr. Allen’s recent memoir, “Apropos of Nothing,” he also disputed that detail, calling it a “fresh creative touch.”