There is a chance that Dean and Sam Winchester's world will collide with Stefan and Damon Salvatore's. The "Supernatural" characters reportedly would take on "The Vampire Diaries" characters in one of its upcoming episodes about vampires. Consequently, a reference of "Twilight" is also expected.

"Supernatural" executive producer Sera Gamble assured fans of "Diaries" that they would not give a direct jab at the fellow CW series. "I don't think there's currently a [Vampire Diaries] mention in the episode," Gamble told EW. "But part of the thing is finding a balance between, say, [showing] a poster from the actual show and having Sam and Dean really speak their minds. We don't want to offend."

Saying that the subject of spoof will be "slightly fictionalize[d]", Gamble is very careful not to ignite war. "I think 'The Vampire Diaries' is a really good show. And I've seen all the 'Twilight' movies. I'm certainly not coming at this from a place of feeling superior to them. I have great respect," she said.

"Supernatural" returns for the new season on Friday, September 24. A new trailer which is quite spoilery has just been released. Sam is back into Dean's "normal" life, but Dean has a hard time to trust his brother.