Twin Peaks online
Episod 0. Pilot
Episod 1. Traces to nowhere
Episod 2. Zen or the skill to catch a killer
Episod 3. Rest in pain
Episod 4. The one armed man
Episod 5. Cooper's dreams
Episod 6. Realisation time
Episod 7. The last evening

On the morning of February 24th, in the town of Twin Peaks, Washington state, lumberjack Pete Martell discovers a naked corpse tightly wrapped in a sheet of clear plastic on the bank of a river. Following the arrival of Sheriff Harry S. Truman, his deputies, and Dr. Will Hayward on the scene, the body is discovered to be that of homecoming queen Laura Palmer, the most popular girl at the local high school. The news spreads among the town's residents, particularly Laura's family and friends. Meanwhile, just across the state line, a second girl, Ronette Pulaski, is found walking along the railroad tracks in a fugue state. Since Ronette was discovered across the state line, FBI Agent Dale Cooper is called in to investigate. Cooper's initial examination of Laura's body reveals a tiny typed letter 'R' inserted under her fingernail. He recognizes this as the "calling card" of a killer who took the life of Teresa Banks a year earlier in a town located "in the southwest corner of the state" (revealed in Twin Peaks: Fire Walk with Me to be Deer Meadow). Cooper quickly establishes that Laura's character and relationships are not as they first appear, and that she's far from the wholesome homecoming queen that those closest to her believed her to be. It is revealed that Laura was two-timing her boyfriend Bobby Briggs with sullen biker James Hurley, a fact known to Laura's best friend Donna Hayward. Cooper also finds traces of cocaine in Laura's diary, indicating a drug habit she shared with Bobby. Meanwhile, Donna and James begin an investigation of their own into Laura's death, and find themselves embarking on a romantic relationship with each other.
Laura's cousin Maddy Ferguson arrives to stay with Laura's parents prior to the funeral. Maddy, who resembles Laura closely, befriends Donna and James and helps them in their efforts to find the killer — even impersonating Laura at one point to fool Laura's psychologist, Dr. Lawrence Jacoby. During his investigation, Cooper stays at the Great Northern Hotel owned by the Horne family. The Hornes' sultry daughter Audrey develops a crush on Cooper that initially appears to be mutual. However, Cooper later rebuffs her advances, on the grounds that she is a high schooler, and that she is involved in the case he is working on. With Audrey's help, Cooper traces Laura's cocaine usage to a brothel called One-Eyed Jack's, which Audrey later infiltrates on Cooper's behalf. It is revealed that Laura had also been working as a prostitute there. Cooper also experiences a bizarre dream, in which he sees a one-armed man called MIKE, who chants a strange poem: "Through the darkness of future past / The magician longs to see / One chance out between two worlds / Fire walk with me." MIKE tells Cooper about another man called BOB, and how they went "killing together." BOB also appears as a man with long, gray hair, dressed in denim, who swears to Cooper, "I will kill again." As the dream continues, MIKE shoots BOB. Cooper then finds himself twenty-five years later, sitting in a mysterious red-curtained room. It is here that he meets the diminutive Man from Another Place, who intones clues to Cooper in the form of strange phrases, and then proceeds to dance to a jazzy beat. Also present is the spirit of Laura Palmer (although the little man at first claims she's his cousin), who kisses Cooper, and then whispers into his ear the name of her killer. When he awakens, Cooper is unable to recall the killer's name.
Agent Dale Cooper (Kyle MacLachlan) meets with the "One Armed Giant"Cooper and the local police force are then able to track down Mike, whose full name is Phillip Michael Gerard. Gerard appears to be nothing more than a shoe salesman, and claims to know nothing of the BOB that Cooper describes. However, it eventually becomes clear that Gerard is possessed by an "inhabiting spirit" (the true "MIKE"), who reveals to Cooper and his colleages the true nature of BOB — BOB is a fellow inhabiting-spirit who has possessed someone in Twin Peaks "for over forty years." Cooper is also visited by an apparition of a mysterious Giant, who provides him with further clues in the murder investigation. All of the information that Cooper has gained from psychic and empirical means, including the mysterious utterances of an eccentric local woman known as The Log Lady, leads him to a number of suspects; but when he discovers the existence of Laura's second, secret diary, he realizes that therein lies the key to solving the mystery. Harold Smith, a local man who was one of Laura's confidants, holds this diary. The secret diary reveals that from a very early age Laura was abused by a figure called "Bob," and that her use of drugs and sex are the means she has used to numb herself and escape from him.