The 100 came to Comic-Con to drop hints about what promises to be an even darker second season than its first. After an action-packed highlight reel, the enthusiastic San Diego crowd was treated to a brief clip from the Season 2 premiere that sees Clarke (Eliza Taylor) attempting a bloody escape from Mount Weather.

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Showrunner Jason Rothenberg came out to talk about what viewers can expect from Season 2, joined by Taylor, Isaiah Washington (Chancellor Jaha), Marie Avgeropoulos (Octavia), Devon Bostick (jasper), as well as Ricky Whittle (Lincoln) and Lindsey Morgan (Raven), both of whom have been promoted to series regulars this season.Rothenberg said that he wanted the fate of some characters to remain up in the air until Season 2 premieres, though the make-up of the panel provides at least a few clues. Whittle said that Season 2 will "get really dark for everyone." Season 2 will dig deeper into the culture and customs of the Grounders. We will learn that they have their own language and their own reasons for attacking the kids when they first arrived that are more complex than we may have initially thought. Rosenberg said that the Grounder warriors memorialize those they've killed by marking their bodies, and its done to honor the dead. He also sees Octavia becoming something of a Grounder this year.The Reapers and the Mountain Men will also be explored in more detail, as will the seemingly one-dimensional bully Murphy. Rosenberg wants to show how Murphy came to be so unlikable. Because most of the characters will be on the ground this season, fans can expect to see new dynamics play out between those that have been fighting it out on the surface together and those that have been on The Ark.Despite being in constant peril, the kids were also in complete charge of their lives. Being reunited with their parents will present new complications seeing as the adults want to be in charge but don't have their children's knowledge about how to survive on Earth. Rosenberg also teased that the intense shared experiences of the surviving members of The 100 has bonded them in such a way that even perceived enemies in the group have more in common with each other than their friends and family from the Ark.The 100: Season 2 of The 100 premieres on Wednesday, October 22nd, on the CW.