第 8 季 共 16 集
播出时间：2009年8月8日
第 1 集 Mr. Monk's Favorite Show
播出时间：2009年8月8日
After the attempted murder of a former child star from Monk's favorite show, Monk accept the job as her bodyguard.
第 2 集 Mr. Monk and the Foreign Man
播出时间：2009年8月15日
Monk meets a visiting African widower who's determined to find the hit-and-run-driver who killed his wife near Monk's apartment. Monk begins to identify with the man and confuses his wife with Trudy.
第 3 集 Mr. Monk and the UFO
播出时间：2009年8月22日
Monk and Natalie are stranded in a small desert town and the detective spots a UFO. He soon discovers himself the center of attention, and is called in to investigate a dead woman discovered in the desert.
第 4 集 Mr. Monk is Someone Else
播出时间：2009年8月29日
Monk assumes a dead hitman's identity in order to foil an assassination plot.
第 5 集 Mr. Monk Takes the Stand
播出时间：2009年9月12日
Monk and the police have a killer right where they want him... until the case goes to court and a hotshot lawyer demolishes the prosecution as he uses Monk's phobias against them
第 6 集 Mr. Monk and the Critic
播出时间：2009年9月19日
Natalie suspects a theater critic is responsible for a murder, despite the fact that he was present to review her daughter Julie's play at the same time the victim died.
第 7 集 Mr. Monk and the Voodoo Curse
播出时间：2009年9月26日
Area residents receive unmarked dolls that seem to predict a series of strange deaths, leading many to suspect a voodoo curse is in play. The mystery hits close to home when Natalie becomes involved.
第 8 集 Mr. Monk Goes to Group Therapy
播出时间：2009年10月10日
After Monk's insurance company refuses to pay for more private therapy sessions, he joins Dr. Bell's therapy group, where it appears that someone is murdering fellow patients.
第 9 集 Happy Birthday, Mr. Monk
播出时间：2009年10月17日
Natalie tries to throw a surprise party for her surprise-hating boss, who is busy trying to solve the murder of a maintenance man.
第 10 集 Mr. Monk and Sharona
播出时间：2009年10月24日
When Sharona returns to San Francisco to handle legal issues related to an uncle's death, Monk suspects foul play and is torn between the differing styles of Sharona and Natalie.
第 11 集 Mr. Monk and the Dog
播出时间：2009年10月31日
Monk reluctantly adopts a dog while looking into the suspicious disappearance of its owner.
第 12 集 Mr. Monk Goes Camping
播出时间：2009年11月7日
To get reinstated, Monk must go camping with the son of a committee member... and try to solve a crime.
第 13 集 Mr. Monk Is the Best Man
播出时间：2009年11月14日
Monk must determine who is trying to ruin a friend's wedding.
第 14 集 Mr. Monk and the Badge
播出时间：2009年11月21日
Upon being reinstated, Monk is put in charge of tracking down a serial killer.
第 15 集 Mr. Monk and the End (1)
播出时间：2009年11月28日
Monk is called to a murder at the location where he first heard of his wife's murder, and while Monk figures out who the assassin is, he doesn't know that the one who ordered the hit is also responsible for the death of Trudy. Knowing that Monk will eventually put all the pieces together, he orders Monk's death, and when all hope seems lost, Monk discovers something which could finally end his 12-year nightmare.
第 16 集 Mr. Monk and the End (2)
播出时间：2009年12月5日
After listening to Trudy's last message, Monk finally discovers who killed his wife. Racing against time before he dies of poison, he must make a fateful decision.
