To tide fans over until the show's Jan. 15 return, The CW has released a teaser for the midseason premiere of Arrow, titled "Blast Radius."

While no official synopsis was released with the clip, it appears that Oliver Queen is desperate to learn the identity of the man in the skull mask. As anyone who has been following the series knows, it's actually alderman Sebastian Blood, who has villainous machinations of his own under the name of Brother Blood. He's the guy using the seemingly lost super-soldier serum on people in the Glades, including Roy Harper.

Arrow returns Jan. 15 at 8 p.m. ET/PT on The CW.