'Firefly' Hunk Sean Maher to Guest as Villain on 'Arrow'

The guest-star list is growing for the second season of The CW’s Arrow with the recent announcement that ‘Firefly’ alum Sean Maher will be appearing in an upcoming episode of the comic-book-laced drama. Maher will play evil Mark Scheffer (otherwise known as DC Comics super-villain Shrapnel), a “serial bomber who places Starling City in a