All four primary cast members from the end of the
season three returned. This included
Tony Shalhoub as
Adrian Monk, the OCD "defective detective,"
Traylor Howard as
Natalie Teeger, his assistant,
Ted Levine as
Captain Leland Stottlemeyer of the SFPD Robbery and Homicide Division, and
Jason Gray-Stanford as
Lieutenant Randy Disher. The character of
Dr. Charles Kroger, Monk's ever-needed psychiatrist, was reprised by
Stanley Kamel in five episodes, a number surpassed only by
Emmy Clarke as
Julie Teeger, Natalie's daughter, who appeared in seven.
Melora Hardin continued to play
Trudy Monk, Monk's deceased wife, and
John Turturro returned as
Ambrose Monk, Monk's agoraphobic brother, after a one-season absence.
Jarrad Paul portrayed Monk's annoying upstairs neighbor,
Kevin Dorfman.
Michael Cavanaugh and
Holland Taylor made their first appearance as Bob and Peggy Davenport (Natalie's ultra-rich parents), and
Glenne Headly (
Karen Stottlemeyer) made her exit from the series, after her character divorced the captain. ==Episodes==