From tvline.com:

"WHAT IS DAWN AND CHARLES’ ENDGAME HERE? (AND DO THEY AGREE ON THE ENDGAME?) | Gale Harold, who plays Charles with delicious zeal, was not at liberty to reveal their master plan. “But I would love to see it be kind of, as it should be, let out bit by bit, but veiled, so it builds up to a question,” he offered. “You have this whole thriller aspect of, ‘Who’s going to unwind the other one?’ Because it’s inevitable that there’s going to be some sort of power struggle between them.”"

Secret Circle: 6 Burning Questions Answered