I feel like they're emphasizing this slendy-exposure leading to extreme suicidal tendencies - Heather was asking if Chris had ever wanted to kill himself, and given her family's many connections to the Order, it seems like whatever exposure she'd had to gorr'rylaehotep had made her feel suicidal at times. Then we have Alex who was clearly at least effected if not stalked, maybe even more than Chris, and it got so bad that slendy arrived, and caused Alex's mind to do who-knows-what. I feel like what happened at the end was Alex attempting to shoot himself, then strangle Heather when she tried to take the gun from him, then she shot at Slendy, but it probably didn't do anything, like when Noah from TT attempted the same.
Am I the only one feeling a romantic subplot between Chris and Heather coming on? I loved the end of this entry. It had a kind of David Lynch feel to it. I am so glad to see that they are actually reintroducing Slenderman into this story. I like DH allot, but it does seem to have forgotten about our tall friend for a while, so it's nice to see he's still around, and seemingly exuding a greater influence now that the characters are emotionally weakened.