Darkness continued to mount this week, as American Horror Story Season 3 Episode 10 may have featured a special guest star... but it also featured another death.

Seriously, death may not exactly stick in New Orleans, but will anyone make it out of this season alive?!?

Singer Stevie Nicks made a special appearance on an episode named in her honor, while Fiona's truce with Marie Laveau also played a key role throughout the hour.

But the issue of who will be the next Supreme remains, well, supreme as we head toward the season finale. Nan seemed like a strong possibility, which likely would have made many fans happy.

However, well... something happened to Nan this week. Something bad. Something seemingly permanent.

Grab some Kleenex and watch American Horror Story online to see what we mean:

Watch American Horror Story Season 3 Episode 10 Online

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.