On Halloween, Monk visits his brother Ambrose in his childhood home to await a visit from his long-absent father, but things take a strange turn when a masked trick-or-treater repeatedly tries to steal Halloween candy.
When Natalie finally catches up with the pizza guy who mistakenly left her $50 in change, she finds him dead in his car. She feels compelled to solve the murder but Monk, sick in bed, offers little help.
A parking garage attendant is inadvertently killed when a murderer targets a financier, and Monk must go undercover as an office worker to solve the case.
While on vacation for his anniversary, Mr. Monk chats with an intrusive but well-intentioned man at dinner. But when he wakes up the next day, everyone insists that the man was never there.
Three months after the execution of Lewis Sweeney, explosions are still rocking the LA area every four days. The unpopular Dr. Sloan continues his efforts to nail Carter Sweeney for the bombings.
Carter and Caitlin kidnap Mark, forcing him to mastermind a 100 million-dollar theft. On the outside, Steve and Ron collaborate to find Mark. Meanwhile, Jesse and the Sloans buy a barbecue joint.
For the first time in years, Monk has made progress in therapy. But when Natalie discovers that Trudy may be alive, she risks unraveling her boss completely.
Natalie asks Randy to be her date to her brother's wedding. But when he's run down in the parking lot, Monk steps in to figure out what exactly is going on.
Andie is devastated by an accidental death of a patient, but as she and the grieving mother overcome their sorrow through forgiveness, they learn that acceptance leads to hope. Stars Aimee Teegarden, Gail O'Grady, Chandler Massey.
Hope is tasked with teaching Manhattan's former "Most Eligible Bachelor" how to dance for his extravagant, society wedding. But as the dance lessons progress, complications ensue when feelings begin to develop between them.
