|First appearance||The Thin Red Line|
|Last appearance||The Thin Red Line|
|Family|| Patrice Madigan (mother) †|
Joseph Purcell (father) †
Dale Blakely (grandfather)
Kaylee Madigan is the baby daughter of Patrice Madigan and Joseph Purcell, both of whom were found dead in the episode The Thin Red Line. Patrick Jane found Kaylee in Patrice's car. Her grandparents are Dale Blakely and Katherine Blakely, and they adopted her at the end of the episode.