 Hearing car horns , Natalie looks down and sees a truck stopped in the intersection . When she also sees Kenworthy , they realize the second heist is in progress . Monk races downstairs , instructing Natalie to call the police . Kenworthy is about to leave with the museum 's diamond when Monk runs towards him . Brandy also chases them . Monk pursues Kenworthy until Monk knocks him unconscious . Kenworthy and his accomplices are arrested , and the diamond is recovered . Brandy immediately goes on television , praising Monk as " The Man Who Saved Christmas . " Natalie and Julie spend Christmas Eve at his apartment , and coax Monk to smile for a group photograph . 
