Styx Feet Under Spoilers
The roles being auditioned for this episode are: Chaplain, Coroner, Doctor, Elderly Man, Harriet, Inspector, Newswoman, Older Man, Patient, Sirk.
Source: Show Fax
The Seer gives tips about the future to a half-demon/half-human man named Sirk who wants to become a full demon. In order to become a demon, he must kill his remaining family members. His first target is a Marine chaplain and, sadly, Piper and Paige aren't able to protect him fully. Paige did say a spell to protect him but it didn't work as expected. Even if the Chaplain has a hole in his body, no one is sure if he's really dead until the Angel of Death appears (yep, the same one who talked with Prue, and who collected the souls of Patty and Grams). The spell actually messed a bit more lives than just the chaplain's because the souls Death is supposed to take don't die. So Sirk can't become a full demon since the souls aren't collected, and the Angel of Death can't do is job because deads aren't really dead. Paige is not happy either with the results of her spell because she messed with the way things are supposed to happen, but if she reverses it, the chaplain dies... To Sirk's surprise, the Chaplain isn't his last blood relative. It's not clear how it happens but Piper dies (yeah, again) and ends up helping the Angel of Death. One of her tasks? Collect Paige's soul! Yep, it's death fest in this episode. Will Phoebe and Leo be able to help both dead sisters?] Will they be able to protect the innocent (aka the last blood relative)? Phoebe has problems with Leslie. Agent Brody, from the previous episode, is still snooping around in this one. Ben from "Cheaper by the Coven" also appears.
Source: Spoiler Fix