By the end of the mid-season finale it will be revealed exactly who Brother Blood is working for, but Oliver won't know that information anytime soon. "He finds out about his Brother Blood persona before we wrap the fall run, but he doesn't discover that that person is connected to Sebastian," Stephen Amell says.
To further complicate that matter is Blood's burgeoning relationship with Laurel. "They start running into each other more," Katie Cassidy says. "They do get involved in a certain way."
Who do you think Brother Blood is working for? And will a relationship between Laurel and Sebastian ignite?