Criminal Minds Guest Stars (120 person items)
"Sienna Guillory as SSA Kate Joyner
Season/s: 3 and 4
Episode/s: 2 Episodes
First Appearance - 20/03 "Lo-Fi"
Last Appearance - 01/04 "Mayhem"
Relatives: Unnamed father
When the New York Terrorist Cell were posing as a serial shooter, a joint FBI-NYPD task force led by Kate to catch him was formed after the fourth murder. After the fifth, she calls Hotch personally and requests the BAU's assistance. At some point during the investigation, Kate is threaten"