'Once Upon a Time' Season 4 News, Spoilers: Josh Dallas Teases Some 'Big Stuff Going Down' for Snow and Charming

Last week's episode of the hit ABC fantasy TV drama series "Once Upon a Time" saw Emma (Jennifer Morrison) finally reuniting with Lily (Agnes Bruckner). However, it appears that Maleficent's (Kristin Bauer van Straten) daughter isn't already the childhood friend whom she has known for.

Lily, in fact, has one thing in mind: to exact her revenge on Snow (Ginnifer Goodwin) and Charming (Josh Dallas) for the cursed life she's been living in.

The situation soon escalated between the former friends and if not for Regina (Lana Parrilla), Emma could have killed Lily when she finds out that the latter wanted to kill her mother.

"If you cross this line, the journey back isn't easy. Trust me, I know," the Evil Queen warned Emma.

Spoiler reports for the upcoming episode titled "Mother" indicated that the things are definitely getting more intense for the characters in Storybrooke.

A promo video for the forthcoming segment showed Lily transforming into a Dragon and spitting fire on to Snow. Charming and Maleficent, on the other hand, tries to hold off the raging Lily.

Speaking to E! Dallas said that this week's episode will certainly put Snow and Charming as well as for the rest of the characters, in a dire situation.

"There's big stuff going down, things that are going to shock the fans, things that a lot of the characters, particularly Snow and Charming, something that they don't want to happen," he said.