I just found this on the fan website of the actor that plays Casey Hughes(www.zachroerig.net)...From the 9/12 SOD
ATWT's summer of teen terror ends this week at Raven Lake, scene of the Oakdale slasher's most recent crimes. As of last week, Casey was presumed dead, while rapist and possible slasher Louis was definitely dead - and Maddie was the prime suspect. But when the cops arrive, Gwen and Will accuse Jade as Maddie continues to run for her life.
"The slasher ends up chasing her again and almost kills her, but Casey saves the day," reports Alexandra Chando (Maddie). "The slasher gets pinned [under a branch] and Casey & Maddie reunite. And then she really needs to see who this killer is, so she lifts up the mask...and it's her sister."
Eve confesses that she blamed Maddie for seducing Louis and ruining her home, so she was hoping to frame her as the killer. "They have a miserable exchange - it was two of my favorite scenes to film, actually. Bonnie [Root, Eve] is a very giving actor and very open. Everybody was really sad to see her go." praises Chando. "She was pinned the entire scene and I was kneeling by her side and we were just going at it, fighting and crying."
Eve then takes one final swipe at Maddie, which Casey blocks using the last of his strength before passing out from his wounds, just as rescuers arrive and arrest Eve. "They just put her in jail, so she could come back," grins Chando, whose character is racked with guilt as Casey is brought into surgery. "She thinks that everything that happened is her fault. She loved him so much that she didn't want to hurt him or have him get hurt by someone else. Maddie is a very resilient person, but she is not going to have an easy time recovering, I can tell you that much. She hasn't yet dealt with the rape, so she needs to go back and seek help for that and then she also has to deal with the fact that so many of these kids died and it was her sister's fault." And while there's a romantic moment coming between the teens, "Thery're taking the whole Casey and Maddie thing very slow."