Latest 'Supernatural' Season 10 episode 18 spoilers hint that the 'Book of the Damned' brings Felicia Day back in the fold next week. The story revolves around the search for the book, and the disasters that the book could bring to their lives.

'Supernatural' Season 10 episode 18 titled 'Book of the Damned' airs on April 15, 2015. According to official spoilers, Felicia Day returns to the show as Charlie. The episode will fulfill Charlie's promise to inform the brothers any thing that might lead to the book while on the road. The story revolves around the search for the elusive book, and the effects it will bring to the characters' lives.

Meanwhile, it was also told that Castiel and Metatron are on their way to find Castiel's grace. But the road may not be smooth as they think it will be, as what the latest 'Supernatural' Season 10 episode 18 spoilers teased.

As per HWHILLS, the official synopsis reads like this: "Charlie (guest star Felicia Day) calls Sam (Jared Padalecki) and Dean (Jensen Ackles) to tell them she found the Book of the Dead which could help remove the Mark of Cain. The Winchesters race to her after she tells them she's been shot by a man named Jacob Styne (guest star Jeff Branson) who says the book belongs to his family and he won't rest until he gets it back.Castiel (Misha Collins) and Metatron (guest star Curtis Armstrong) take a road trip to find Castiel's grace but they hit a couple road bumps along the way."

Elsewhere, one of the remarkable actors, Jim Beaver, may return to the show. In a recent interview with TV Line, actor said that the show's looking ways to make use of him.

"They haven't specifically said anything about anything more, but I do know that they're very fond of the character and they're always looking for a way to make use of him in a way that fits in well for the show. So I have little doubt that I'll be back as often as it's practical," Beaver told TVLine.

Fans, are you excited for the upcoming season? How about the return of Felicia Day? Share us your thoughts below about the latest 'Supernatural' Season 10 episode 18 spoilers.