As "Arrow" prepares for its mid-season 2 premiere with episode 10 titled "Blast Radius," a few more spoilers have surfaced.

On January 15, "Arrow" season 2 episode 10 will air, and thanks to a new extended promo of the second half of the season, we have a better idea of what's to come.

During the promo, we learn that the storyline regarding Brother Blood aka Alderman Sebastian Blood will continue as Oliver attempts to track down "the man in the skull mask."

In addition, a new villain will be introduced called Shrapnel, portrayed by Sean Maher.

Thanks to spoilers by Hypable, here is the (very detailed) synopsis of "Arrow" season 2 episode 10.

"Oliver must tackle a new threat to the city when bombs start to go off in Starling City. Felicity discovers the person setting them off is Mark Sheffer, a man who goes by the nickname Shrapnel. Arrow discovers Shrapnel’s next target is Sebastian Blood’s 'Unity Rally' and tries to talk the alderman out of hosting it, but he refuses. Arrow sets off to stop the bombing, but Shrapnel tricks him and traps him in a bomb-laced antique store where he is unable to move without setting off the device. While Felicity helps Oliver, Diggle races to the plaza to find the bomb before it goes off. Meanwhile, Roy continues to hide his new strength from Thea but, after she witnesses his super strength in action at the rally, she demands answers. Laurel’s suspicions about Sebastian grow stronger once she learns that he grew up with Cyrus Gold, the man who killed Lance’s partner. After Donner refuses to help her investigate, she turns to Arrow for help."

In addition, a new clip of the mid-season premiere is now available, which provides spoilers regarding the subtle love triangle between Oliver, Felicity, and Barry Allen.

Reportedly, Summer Glau will reprise her role as Isabel Rochev.