"Supernatural" Season 10 Episode 14 is entitled "The Executioners Song." The latest episode is basically a fight between Dean and Cain, humanity's first killer. So who would win in the fight, which involves the First Blade - would it be Dean or Cain?

The official synopsis of "Supernatural" Season 10 Episode 14 reads: "Dean (Jensen Ackles), Sam (Jared Padalecki) and Castiel (Misha Collins) deal with Cain's (guest star Timothy Omundson) return. Crowley (Mark Sheppard) and Rowena (guest star Ruth Connell) continue to grow closer but when Crowley bails on plans with his mother to help the Winchesters, Rowena lets him have it."

For dedicated fans of the show, the last time Cain made an appearance was in season 9 when he agreed to give Dean the Mark of Cain plus the location of the First Blade. Jeremy Carver, the show's executive producer, had nothing but great things to say about Cain's return. Cain is played by Timothy Omundson.

"Let me say this: I think the episode with Cain is really great," shares Carver in a report by International Business Times UK.

Now, it's back to Dean and Cain facing off. The big question now is who wins and who loses?

In the trailer for "Supernatural" Season 10 Episode 14, Cain says Dean can't stop him to which Dean says he'd do what he has to do. While this is enough to give fans hope that Dean might be able to turn the tables and win the fight, the 20-second trailer ends with Dean losing the fight. Check it out below.

Apart from the dreaded fight between Dean and Cain, the 20-second clip shows Castiel and his face-off with Cain as well. Would "Supernatural" Season 10 Episode 14 also feature a fight between the Fallen Angel and Humanity's First Killer?

"Supernatural" Season 10 Episode 14 is written by Robert Berens and is directed by Phil Sgriccia. The latest episode airs by 9:00 p.m. EST.