The CW had released the first promo for episode 2.12 of "Arrow" which you can check out in the player below! Titled "Tremors," the episode is described as follows:
"Arrow offers to train Roy so he can learn to control his newfound super-strength. However, Roy is a rebellious student and refuses to listen unless Arrow reveals his true identity, which Oliver refuses to do. Meanwhile, the Bronze Tiger (guest star Michael Jai White) escapes from prison and steals Malcolm’s earthquake machine to sell to the highest bidder. Oliver, Diggle and Felicity attempt to stop the transfer, but Roy gets in the way, putting everyone in danger. Laurel (Katie Cassidy) is disbarred and spirals out of control. Moira is thrilled when Walter (guest star Colin Salmon) asks her to dinner, but his reason surprises her. Thea encourages her mother to ask Walter to reconcile."
Directed by Guy Bee and written by Marc Guggenheim & Drew Z. Greenberg, "Tremors" will air on January 29. "Arrow" airs on Wednesdays at 8 P.M. ET/PT on The CW.