* AbusiveParents: Apparently the motive for the murders. [[spoiler:PlayedWith: the teenage suspects' parents weren't abusive; but their therapist's father was.]]
* BodyHorror: Of a kind; a man cuts a tree with an axe and blood pours from the wound.
* CallingTheOldManOut: [[InvokedTrope Invoked.]] [[spoiler:Karin, projecting her abusive childhood on other kids, coerces them into 'standing up to' their fathers, regardless of whether said fathers are actually abusive.]]
* CreepyBasement: Karin used to be locked up in one when she was small and she in turn locks there another girl who has to watch her aunt's murder and her body through a small window. Moreover, there is Karin's fatherís body covered in tree roots in the cellar.
* DemonicPossession: [[spoiler:Karin]] is possessed by [[spoiler:the ghost of her abusive father]].
* DestinationDefenestration: The trees suck the girl's father out of the room through a window.
* FairyTaleMotifs: There's a DeusExMachina woodcutter at the end, which is a reference to Little Red Riding Hood.
* HopeSpot: A girl, trapped in a cellar, sees Scully and Mulder through a small window, but they don't notice her, and drive away. [[spoiler:Later, the girl calls to her aunt, who finds her and tries to save her, but is killed before she can do so.]]
* IKnowYoureInThereSomewhereFight: Mulder tries this when the villain is finally revealed, [[spoiler:only for the Orchard Man to chop her head off]].
* PsychoPsychologist: Karin turns out to be haunted by her childhood experience and she keeps projecting her issues on other kids.
* QuicksandSucks: [[SubvertedTrope Subverted.]] Several characters are sucked into the mud, but [[spoiler:they're actually being pulled in by possessed tree roots.]]