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This article contains plot spoilers for the 2017 series of Twin Peaks.
"I have been assigned a secretary. Her name is Diane ... She seems an interesting cross between a saint and a cabaret singer."
Dale Cooper[src]

Diane Evans was FBI Special Agent Dale Cooper's secretary to whom he dictated all of his tapes.


Early lifeEdit

Diane had a half-sister named Jane, whose nickname was "Janey-E." Diane hated Janey-E and they later became estranged. Janey-E married a Douglas Jones and lived in Las Vegas.[1]


Diane was assigned as Cooper's secretary on his first day working for the FBI, December 19, 1977. He described her as an "interesting cross between a saint and a cabaret singer," and addressed most of his tapes to her from that moment on, even ones where he appeared to be talking to himself.[2]

She appeared to show concern for Cooper, as she sent him flowers during his absence after taking a life for the first time.[2]


Cooper standing outside of Diane's office

One day in early 1988, Cooper stood outside of Diane's office and mentioned that she had not changed her hair and was wearing a dress she had worn before, but he noticed that she had indeed changed something in the room. He took a moment to figure it out and excitedly noted that she moved a clock twelve inches to the left. Before leaving, he requested a "damn great pot of coffee" made from Sally's ground coffee.[3]

Diane joined Cooper for a Chinese food dinner on June 10, 1988, and he noted the next day that despite having known her for over ten years, he did not know her last name.[2]

"Special Agent Cooper . . . Dale and I had dinner once. We ate Chinese. We had wonton soup, egg rolls, and Peking duck. That's the one where they inflate the bird with air, swelling it to over double its original size. Without a doubt the most delicious skin I've ever eaten, firm and at the same time delicate. And the meat itself takes on a flavor when slid into the mouth. . . . Well, I couldn't get enough of it."

During Cooper's investigation in Twin Peaks of the murder of Laura Palmer, Diane fulfilled Cooper's requests for a pair of earplugs[4] and back issues of Flesh World.[5]

Later yearsEdit

Twenty-five years after Cooper's disappearance, Diane regularly drank at Max Von's Bar in Philadelphia, where Albert Rosenfield found her one evening.[6] She refused to assist him in a case that involved Cooper, but reluctantly agreed when Deputy Director Gordon Cole accompanied him the next morning.[7]

She went with them and Agent Tammy Preston to South Dakota, where she briefly met with Cooper, with whom she recalled a night they both clearly remembered. Shaken by the meeting with Cooper, she told Cole that this was not the Cooper she knew, for he lacked the heart that she knew Dale had.[7]

On the way back to Philadelphia, Cole had the plane re-routed to Buckhorn, South Dakota to investigate the body of Major Garland Briggs, an associate of Cooper from his time in Twin Peaks. Upon arrival at the police station, Diane decided to stay in the lobby, where she read a text that read, "AROUND THE DINNER TABLE, THE CONVERSATION IS LIVELY."[8]

Diane and the FBI were later led to where William Hastings claimed to have entered an alternate dimension he referred to as "the zone." As Albert and Gordon investigated, Diane spotted bearded men, particularly one that exited Detective Dave Macklay's car after Hastings' head suddenly exploded. Diane brought this up to the group later, but was not entirely sure of what she saw. She also studied a photo Albert took of Ruth Davenport's arm, which contained a set of coordinates written on it.[9]

Diane was soon brought onto the investigation in an official capacity. At the bar, she responded to the text "Las Vegas?" with "THEY HAVEN'T ASKED YET."

Later, she searched the coordinates from the photo of Ruth's arm, finding that they led to Twin Peaks.[10]

Diane was later asked by Cole, Preston, and Albert if Cooper had mentioned Major Garland Briggs during their last meeting. Albert explained Briggs' relation to Cooper's work and Diane recognized the inscription on a ring found in Briggs' stomach, as it belonged to her half-sister Janey-E's husband, Dougie.[1]

Behind the scenesEdit

Cooper 002

Cooper with the tape recorder he uses to address tapes to Diane

During the first season, it was reported by several outlets that Carol Lynley had been cast as Diane.[11][12] Mark Frost confirmed in 2014 that this report was false.[13]

Diane appeared on-screen for the first time in the 2017 revival, played by Laura Dern, who has appeared in several David Lynch projects, including his films Blue Velvet, Wild at Heart, and Inland Empire.



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