Ray Donovan, the long-running Showtime series about a grizzled-as-all-hell fixer for the extremely wealthy, will not be returning for an eighth season. At least, not on Showtime. The network announced its decision today in an official statement, which means that the cliffhanger episode which ended Season 7 will have to serve as the series finale. [caption id="attachment_671488" align="alignright" width="360"] Image via Showtime[/caption] “After seven incredible seasons, Ray Donovan has concluded its run on Showtime,” Showtime’s statement reads. “We are proud that the series ended amid such strong viewership and on such …