The Arrowverse is a shared universe consisting of DC properties centered around the CW's live-action television show, ARROW. Other shows which expanded the universe include THE FLASH, VIXEN, and DC'S LEGENDS OF TOMORROW. These shows have crossed-over with other television shows, and these others could be loosely considered part of the Arrowverse, as the concept of a shared television 'multi-verse' was introduced in THE FLASH. The Arrowverse includes media outside live-action television shows, including novels and comic books.