|Played by||Ivana Miličević|
When she is attacked and apparently killed by a werewolf.
It is revealed that Kathryn is still alive but has become a werewolf. Kathryn kills Will's father, then goes to Will's school to explain Will's werewolf heritage to him.
Kathryn captures Eliana to force Will to become a werewolf. Will fights Kathryn with weapons, but Kathryn is too powerful to be killed by silver bullets. Another werewolf raveal to be Eliana attacks her and rips her heart out.