'Supernatural' season 12 plot spoilers: Mary and Dean Winchester team up to find Sam; British Men of Letters not villainous?

For the Winchester brothers, losing each other and going on a wild goose chase to find one another has become an inevitable way of life. But with the upcoming season's new threats, reuniting and staying together may become twice as hard, if not at all impossible.

Good thing Mary Winchester (Samantha Smith) is back to try and keep her boys safe, something that she has not been able to do in the past. And if the latest "Supernatural" season 12 teaser trailer is anything to go by, it looks like Mary, who has previously given up her hunter life to raise a family with husband John Winchester (Jeffrey Dean Morgan), wasted no time at all getting back in the game for the sake of finding her youngest son, not at all caring about who or what she would have to face to get to him.

Last season, Sam Winchester (Jared Padalecki) was kidnapped and tortured by the British Men of Letters. The previous season's finale episode saw a woman named Lady Antonia "Toni" Bevell (Elizabeth Blackmore) effortlessly break into the heavily secured bunker that has been the Winchesters' safe haven since season eight. She banished the angel Castiel (Misha Collins) and then shot Sam after informing him that he and his brother were due for a punishment from the British Men of Letters.

The Winchester brothers have always had a tendency to choose each others' safety over the greater good, a fact that Dean Winchester (Jensen Ackles) pointed out earlier in the previous season. And despite promising each other that they were never going to repeat that same mistake again, they still end up choosing each other every time. Blood really is thicker than water, after all. But the British Men of Letters are apparently fed up with it.

In an interview with TV Line, series writer turned executive producer Andrew Dabb said that the British Men of Letters is not as villainous as fans might think, and that they are not at all above working with the Winchesters if it means fighting a common enemy.

"Supernatural" season 12 premieres on Thursday, Oct. 13, at 9 p.m. EDT on The CW.