 He injects the interrogation drug chemical "Red Star" in him to make him relieve his worst moments in his life and leaves him in his Lian Yu prison cell with a gun, confident that he will commit suicide.In season five finale, "Lian Yu", Oliver escapes the prison, kills Kovar and his men before setting his own rescue as depicted in "Pilot".Mark Antony Krupa played Leonid’s father Konstantin Kovar in the pilot episode of "Titans".