 Jackson Whittemore (Colton Haynes), bitten by Derek Hale at the end of Season 1, shows signs of rejecting Derek's bite, but the reason is a mystery.As Allison's grandfather Gerard Argent (Michael Hogan) comes to town for his daughter Kate Argent's (Jill Wagner) funeral, he decides to avenge her death by declaring war against all werewolves, innocent or not.Isaac discovers his abusive father was killed by a strange creature.