Torchwood star and recurring Arrow villain John Barrowman has just signed a deal that will see him popping up more frequently on the CW’s stable of D.C. superhero shows. (The D.C Televisual Universe? That can’t be right.) Following in the chilly footsteps of Wentworth “Captain Cold” Miller (who signed a similar cross-series deal earlier this year), Barrowman is now a sort of floating free agent of evil, ready to bring his character, Malcolm Merlyn, to shows like The Flash, Legends Of Tomorrow, or the recently migrated Supergirl.