A former San Francisco police detective suffering from an extreme case of obsessive-compulsive disorder is called in to investigate an apparent assassination attempt of a mayoral candidate in which one of his bodyguards is killed.

With an introduction to Monk's talent, his phobia's, and need for an assistant, Monk investigates the murder of the candidate bodyguard and a political worker. He determines the candidate was not the intended target.

When English teacher Beth Landow falls from the clock tower at Trudy's former high school, the assistant principal doubts the police department's conclusion that the death was a suicide and invites Monk to investigate. Monk quickly concludes that the suicide note is a forgery: a highly respected English teacher wouldn't confuse ""its"" with ""it's."" A few words with the teachers in the lounge lead him to suspect that the murderer is a science teacher, Derek Philby. Unfortunately for Monk, Philby was proctoring an SAT exam when Ms. Landow's body landed on Philby's car, setting off his car alarm and alerting the entire school to her death. Armed with a strong suspicion but no evidence, Monk becomes a substitute teacher in hopes of finding the information that will incriminate Philby, who arrogantly informs him that he's ""failing the class""--he has no evidence to support his hypothesis. Faced with students who throw erasers at him, an irate father who is also the school's gym teacher threat

When a ruthless CEO and his wife are lured to an industrial park and are shot dead in their car, Monk connects their murders to a star baseball player's quest for the single season home run record.

When a sarcastic and unpopular ringmaster is murdered by an acrobat wearing a face mask and a Ninja-like costume, Stottlemeyer suspects an animal trainer who not only has a motive but also owns the murder weapon. Monk, however, suspects the ringmaster's ex-wife, a trapeze artist billed as The Queen of the Sky who is also a sharpshooter. Meanwhile, the Monk alienates Sharona by telling her that her fear of elephants is irrational and advising her to suck it up.

Sharona's actress sister, Gail, is suspected of murdering Hal Duncan, a fellow actor who dies onstage after Gail stabs him with what she insists is a retractable knife. When Sharona's mother (who thinks that Sharona is Monk's partner, not his assistant) arrives for a visit and Sharona tells her the bad news, Monk and Sharona promise to ""do whatever it takes"" to discover what really happened. ""Whatever it takes"" turns out to be a bit more than Monk bargained for, however. After talking with the props manager, he begins to suspect that Jenna Ryan, Gail's understudy, somehow killed Duncan and framed Gail, even though she was at a party on the other side of town when Duncan died. In order to talk with and observe Jenna, he endures a painful half hour at a speed dating service and even agrees to take the dead man's part in the play for two days until a new actor arrives. While Monk is on stage battling stage fright and fully aware that one of the knives on the stage is real, Sharona searche

Monk suspects that the man responsible for the mail bombing murder of rich and beautiful Amanda Babbage is the victim's brother, Brian – who has been in a coma for four months after attempting to lure Stottlemeyer and Disher into a car chase and crashing into two cars. Since the package was postmarked three days before the bombing, Stottlemeyer is naturally skeptical, but he prefers siding with Monk to tagging along behind Agent Grooms of the Bureau of Alcohol, Tobacco, and Firearms, who suspects the victim's other brother, Ricky.

Suspecting that her boss, Elliott D'Souza, has been murdered by playboy/publisher Dexter Larsen after withdrawing his financial backing for Larsen's Sapphire magazine, D'Souza's secretary hires Monk to investigate. After enlisting the help of the initially reluctant Stottlemeyer and Disher and convincing them that D'Souza's death was no accident despite his being alone in a room locked from the inside, Monk suddenly tries to withdraw from the case. The reason? Larsen has obtained and is threatening to publish nude photographs of Sharona, relics of her past as a struggling single mother in Atlantic City. When Sharona discovers the reason for Monk's strange behavior, her first reaction is shame and fear, but Benjy's response to her partial confession arms her with fierce determination to retrieve the photos and ""nail"" the murderer. Through the common bond of motherhood, she persuades the Sapphire Girl who had provided Dexter's alibi to confess the truth. Meanwhile, Monk puts together De

When Monk's paperboy is murdered on his doorstep by a guy looking to steal his newspapers, Monk turns to the pages of the newspaper for clues to solve the baffling crime.

After visiting the set of the hit TV series Crime Lab S.F. during a celebration of its one hundredth episode, Monk suspects the show's star, Brad Terry, of murdering his ex-wife so he won't have to share his huge new paychecks with her. But the actor's alibi seems solid--he was with photographers when the victim's screams were heard. To complicate matters, a fan confesses to the crime and Terry passes a lie detector test. After Terry invites the captain, Disher, and Sharona--but not Monk--to a party, Monk realizes that Terry reminds him of a popular boy who treated him the same way in sixth grade and begins to doubt his own instincts. But when Stottlemeyer invites Monk to hear Marci's confession, Monk's doubts shift to Marci's story. When she tells him that Terry's ex-wife was once an actress who made a single B movie, Monk has the clue he needs to solve the crime.

In yet another case of murder in a room locked from the inside, a music producer is found dead with bullets in his back, head. and chest, clearly neither an accident nor a suicide. But this time there's a further twist: the dead man's pet chimpanzee, Darwin, is caught with the murder weapon in his hand. Not wanting to make a monkey of himself by falsely accusing a chimpanzee of murder, Stottlemeyer takes the chimp into the interrogation room, tempting the animal to fire what he thinks is an empty gun. Meanwhile, Disher realizes that he's inadvertently given the captain a loaded gun and panic ensues. When the gun goes off, endangering not only Stottlemeyer but Disher, Monk, and Sharona as well, Stottlemeyer is persuaded that the chimp is guilty and is ready to allow animal control to put him to sleep. Sharona, however, is convinced that Darwin is innocent. In desperation, Sharona resorts to breaking and entering to rescue Darwin, persuading the most unlikely person imaginable to take hi

Three deaths during a city-wide blackout result in a joint investigation by Stottlemeyer, Monk, Sharona, and Disher, with the unprecedented cooperation of the FBI and the help of power company spokeswoman Michelle Rivas, an attractive brunette who is inexplicably attracted to Monk. While Sharona and Dr. Kroger pressure Monk to call Michelle, Disher follows up on Monk's suggestion that the power outage is connected to a '90s radical named Winston Brenner. Everything fits--the handwriting in the note, the phrasing, even a pair of photographs. Everything except one small detail at the end of the report--Brenner died in 1995. When the FBI acknowledges the possibility that Brenner may have faked his own death to avoid a trial, Captain Stottlemeyer presents a tree-hugging former friend of Brenner's with the evidence that Brenner is still alive and reminds him that this particular power outage is also a homicide. When the tree-hugger is murdered, it becomes clear that the killer is indeed Bre

When five members of the West Coast Mafia are shot down in a barbershop, Monk is pressured by mob godfather Salvatore Lucarelli and his nephew ""Fat Tony"" to solve the case. But the FBI in the person of Agent Colmes is pressuring him, too. Despite Captain Stottlemeyer's insistence that Colmes is not to be trusted, Monk accepts his offer of reinstatement on the police force if he can bring down the whole gang. The only clues are a partially completed crossword puzzle and a gumball machine that was apparently used to break a back window so the killer could escape. With a Mafia bodyguard named Vince as their ""babysitter,"" Monk and Sharona interview the sole witness, Phil Bedard, a young U.S. mint employee who tells them that he saw three men running from the scene, one of them wearing a jacket with a strange-looking number 15 on the back. Bedard also explains the heightened security at the mint: someone has stolen five double-headed pennies. Associating the numbers on the jackets with a Ch

It's Sharona's turn to be terrified. After several frightening and mysterious encounters with a blood-soaked man that no one else can see, she begins to doubt her own sanity, and Stottlemeyer advises Monk to give her time off to restore her nerves. Monk is left with an irritating substitute nurse whose philosophy is the opposite of Sharona's: everything from Monk's requests for wipes to the obsessively systematic organization of his refrigerator has to go. Wanting Sharona back again, Monk goes to the garage where Sharona first saw the blood-soaked man and finds a clue--the silver tip from the toe of a cowboy boot. Meanwhile Sharona, who is attending a night class in creative writing, apparently forgets to turn in an assignment and seems to be misplacing objects. But when her writing instructor's husband dies of a heart attack after eating tomato soup, Sharona recognizes the plot of her missing story and realizes that she's not crazy. All she and Monk have to do now is tie together the...

When Edna Coruthers, a model employee at a giant chain store called Mega-Mart, is killed by a falling television set, Monk is called in to investigate by the store's security chief--who turns out to be his disgraced ex-partner, Joe Christie. Neither Monk nor Stottlemeyer wants to work with Christie, whom they hold responsible for some missing cocaine and the death of two police officers, and both of them disregard the evidence that Edna might have been murdered--a broken shoe heel (suggesting that the victim ran from someone or something), her dust allergy (which normally kept her from entering the loading dock where the death occurred), and the three letters (in different handwriting but with similar stamps) complaining about the victim. Twenty-seven days later, realizing that the stamps were all from the same roll and therefore from the same person, Monk reluctantly agrees to help Christie discover a suspect and a motive by working undercover as a store clerk. But he still doesn't tr