Mia maestro and David Bradley on 'The Strain'

Throughout the first two seasons of “The Strain,” the show has shown that it’s not afraid to diverge from the source text — the trilogy of novels by Guillermo del Toro and Chuck Hogan. However, with the Season 2 finale, “Night Train,” “The Strain” made the biggest change yet and one that will greatly impact the story right through to the conclusion.

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As “Night Train” came to a conclusion, Nora (Mia Maestro) was infected by Kelly (Natalie Brown), leaving her with very few options other than killing herself to be saved from turning into a vampire. Eph (Corey Stoll) watched this all happen, bringing their on-again/off-again relationship to a definite conclusion.

With Nora now dead, those who know the books well may be wondering what the plan is. After all, in the third and final novel, “The Night Eternal,” Nora is one of the few characters that actually survives the vampire outbreak. In the end, she and Fet (Kevin Durand) fall in love and move to Vermont, where they have two children together.

RELATED: What happened to ‘The Strain’s’ Zach?

Clearly, that can’t happen now. Instead, there’s a question mark floating above Fet’s future. With the show willing to make major changes to the books’ canon, it seems nobody really is safe. At this point, the one in the most danger is Zach (Max Charles).

After a season of trying to outrun his mother Kelly, Zach went to her. However, instead of being turned he was kept human. Clearly, there’s a bigger plan in pay for Zach, but fans are going to have to wait until Season 3 in 2016 to find out what they are.

Posted by:Chris E. Hayner

Chris E. Hayner is equal parts nerd, crazy person and coffee. He watches too much TV, knows more about pro wrestling than you do and remembers every single show from the TGIF lineup. You may have seen him as a pro-shark protester in "Sharknado 3." His eventual memoir will be called "You're Wrong, Here's Why..." TV words to live by: "I'm a firm believer that sometimes it's right to do the wrong thing."