After 14 long years, Sam and Dean Winchester of “Supernatural” are finally taking their final bows. As the long-running series of The CW wraps up its 15-season run, fans can expect Season 15 to be its most gripping one yet.

The sneak peek for the Season 14 digital featurette “The Winchester Mythology: The Choices We Make” dropped some hints as to what Season 15 would be all about. In the sneak peek, showrunner Andrew Dabb revealed that the end of the series would see the end of the world.

“God was not kidding when he said it was the end of this story,” said Dabb. “And by the end of this story, it means the end of the world. The question of what that looks like, the question of how Sam and Dean deal with that, I think those are the big things that we are going to explore going into season 15,” he added.

“Supernatural” Season 15 will pick up exactly where the previous season left off, with Jack in the Empty and with Death ready to carry out his dark plan. The final moments of Season 14 also saw Sam, Dean and Cas trapped in the midst of Zombies.

It can be recalled that in the previous season, Chuck, a.k.a. God, wasn’t happy that his “favorite show” did not go as planned. He expected Dean to kill Jack, but he didn’t. Instead, Sam went and tried to shoot Chuck. That moment was reminiscent of the Season 5 finale, “Swan Song,” where Chuck famously said “Nothing ever really ends.”

In the Season 14 finale, he ate his words. “Welcome to the end,” he said as he brought up spirits from Hell. Apparently, the spirits included some of the Winchester brothers’ old cases.

Jensen Ackles also revealed in the featurette that all the old monsters are coming back in the final season. “The world has just opened up, essentially, and all of those things that we have spent so many years fighting, they’re going to come knocking now,” he said.

As to the fate of the core trio, Dean, Sam and Castiel, Collins said that he would like the main characters to die in the finale. “I hate to say this but I kind of hope that the main characters on the show die at the end,” he said. “I feel like we need that finality,” he added.

 The world is ending in Season 15, and the Winchesters can’t do anything to stop that, but the death of Dean, Sam and Castiel is something that cannot be foretold this soon. As for Jared Padalecki, he would not want to see Sam die in the final season.

“I don’t want Sam to feel like it’s the ending,” he said. “I don’t want it to feel like doom and gloom, too much … I want Sam to still fight, to keep fighting and keep supporting his brother and his friends and his family,” he added.

“Supernatural” Season 15 will premiere on Oct. 10 on The CW. The series will keep its old time slot, 8 p.m. EST, Thursdays.

Supernatural Jim Beaver will return as Bobby Singer in season 10 of the CW hit-series "Supernatural." Facebook