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"[This plot] was such a gift, and so much fun," Troian gushed. "I'm so excited for the fans to see it, because I don't think that they've ever seen Spencer like this.
Troian revealed one thing we can expect is to see Spencer beat herself up over her failure to recognize the warning signs earlier.
"I think that truly is one of the biggest heartbreaks for Spencer, because she has so much pride in her intelligence," Troian explained. "And you see that with Mona [Janel Parrish], too. Her devastation is not that this person was torturing her, but that she didn't figure it out ... And I think it's the same thing that happens all over again with Toby."
For much more from Troian, check out the full interview at After Ellen.