Episode 18: 'Masked Ball' (Story Code '2018') by Barry Pullman

Agent Cooper’s conduct is to be investigated by the FBI and the DEA, to be carried out by transvestite DEA Agent Denis ‘Denise’ Bryson. Nadine Hurley joins the High School wrestling team, and falls for teen-hunk Mike Nelson. James Hurley encounters a beautiful and wealthy woman named Evelyn Marsh, who gives him a job, a place to stay, and more besides. Dick Tremayne becomes a ‘big brother’ to an orphan named Little Nicky, in order to impress Lucy Moran. Ben Horne learns from Hank Jennings that Jean Renault has taken over One-Eyed Jack’s. Cooper receives a sinister message from the psychopathic Windom Earle. Dougie Milford weds young bride Lanna Budding. Catherine Martell humiliates Josie Packard by employing her as her maid. Andrew Packard, believed to be dead, comes out of hiding and arrives in Twin Peaks.

Kyle MacLachlan (Special Agent Dale Cooper), Michael Ontkean (Sheriff Harry S. Truman), Madchen Amick (Shelly Johnson), Dana Ashbrook (Bobby Briggs), Richard Beymer (Benjamin Horne), Lara Flynn Boyle (Donna Marie Hayward), Sherilyn Fenn (Audrey Horne), Warren Frost (Doctor William Hayward), Peggy Lipton (Norma Jennings), James Marshall (James Hurley), Everett McGill (Ed Hurley), Jack Nance (Pete Martell), Kimmy Robertson (Lucy Moran), Joan Chen (Jocelyn ‘Josie’ Packard), Piper Laurie (Catherine Martell), Harry Goaz (Deputy Andy Brennan), Michael Horse (Deputy ‘Hawk’ Hill), Chris Mulkey (Hank Jennings), Ian Buchanan (Dick Tremayne), Clarence Williams III (FBI Agent Roger Hardy), James Booth (Ernie Niles), David Duchovny (Agent Denise / Dennis Bryson), Wendy Robie (Nadine Hurley), Charlotte Stewart (Betty Briggs), Gary Hershberger (Mike Nelson), Tony Jay (Dougie Milford), Robyn Lively (Lana Milford), Annette McCarthy (Evelyn Marsh), Royce D. Applegate (Minister), Ron Taylor (Coach Wingate), Dan O'Herlihy (Andrew Packard), John Boylan (Mayor Dwayne Milford), Catherine E. Coulson (The Log Lady), Jill Rogosheske-Engels (Trudy), Joshua Harris (Nicky), David Lynch (Voice of Gordon Cole)*, Kenneth Welsh (Voice of Windom Earle)*, Gerald L'Ecuyer (Bartender)*
*(Uncredited)

Directed by Duwayne Dunham
Produced by Harley Peyton
Executive Producers Mark Frost and David Lynch

TX:
US TX - 15th December 1990

Notes:
*Featuring FBI Agent Dale Cooper, Sheriff Harry S. Truman and the townsfolk of Twin Peaks