Scott and Derek are targeted by an assassin at the lacrosse team's bonfire on Teen Wolf. "Perishable" is the ninth episode of the show's fourth season.
Parrish: Just tell me one thing. Are all of you like Lydia? Are you all psychic? Derek: Psychic? Parrish: Yeah. Scott: Not exactly. Parrish: OK then, what are you? [Scott replies with blazing red eyes.]
Parrish: I was set on fire. All of me should be gone. Scott: Not if you're like us. Parrish: Like you? Derek: I don't think he's like us. Lydia: Then what is he? Derek: I'm sorry, but I have no idea.