'Supernatural': Heartbreaking Series Finale Met With Sobbing and Outrage From Fans on Twitter

After 15 seasons, the hit show came to an end and fans had some mixed emotions about Sam and Dean's fates.

*Caution: Spoilers ahead! Do not read if you haven't watched the season 15 finale!

After 15 seasons, Supernatural came to a definitive end on Thursday with a series finale that left many fans divided. The finale undeniably closed the book on the Supernatural saga, and fans responded with a mix of outrage and uncontrollable weeping.

After the previous episode, "Inherit The Earth," wrapped up all the season's storylines, Thursday's series finale, "Carry On," opened with the Winchester brothers, Sam (Jared Padalecki) ad Dean (Jensen Ackles) sitting around, bored, with no evil to fight.

Soon, however, they come across a group of vampires who are kidnapping children and they hunt down their nest. In a sequence that feels like a freak-of-the-week episode from the first season, Dean and Sam duke it out and decapitate some bad guys.

That is, until, Dean gets inadvertently impaled on a piece of rebar sticking out of a wall during the fight, right as Sam kills the final vampire. Dean then delivers an impassioned and heartfelt monologue to his brother about the importance of carrying on and living his life, and then he straight-up dies.

Needless to say, this fairly shocking turn of events threw many viewers for a loop. There were quite a few who couldn't contain their tears over watching a beloved character get killed off after all these years.

However, there were a whole lot of fans who were downright enraged that this was the unceremonious end for Dean. After 15 full seasons of battling all-powerful gods and demons and every bad guy under the sun, Dean meets his end because of a sharp thing sticking out of a wall.

Dean's death, however, came about half-way through the show, so there were some who were still holding out hope that Sam would somehow save his brother or bring him back to life.

However, this didn't pan out. The finale saw Sam moping around heartbroken for a few minutes before revealing that Dean made his way to Heaven -- which the show presents as a beautiful forest filled with babbling brooks and open roads.

Dean is reunited in Heaven with Bobby Singer (Jim Beaver), as well as "Baby," his 1967 Chevy Impala, which he gleefully drives through the dirt roads with Kansas' "Carry On My Wayward Son" blaring loud.

Meanwhile, fans get a chance to watch Sam spend time with his baby boy, whom he named Dean. We see Sam and "Baby Dean" grow up to be a teenager, then a young adult -- all the while Sam grows older as well (we can tell because of his white hair).

Eventually, we see Sam in a hospital bed in the family's living room as an old man, and his son gives him permission to die. Then he flatlines and ends up in Heaven (young again) and joins his brother on a bridge over a river. Not exactly the blaze of glory ending many might have expected.

Needless to say, fans were split when it came to the emotional afterlife reunion that capped off the show's lengthy run.

Check out the video below for more on the 15th season of Supernatural.