Michael Emerson is heading to Starling City. The CW announced at Comic-Con that Emerson, best known for his roles in ‘Lost’ and ‘Person of Interest,’ has been cast in the recurring role of an unnamed mystery character that has yet to be announced.

The CW also confirmed that David Nykl will reprise his role as Anatoly Knyazev, Oliver Queen’s friend/mentor/nemesis, in the sixth season.

Arrow’s season six premiere moves to its new night on Thursday, October 12th at 9 p.m. Eastern/8 p.m. Central on The CW.