Syfy’s original series Haven is returning for a second season this July, but not before getting a boost in its production department: Haven adds a guest star for a 4-episode story arc in addition to directing an episode, and a writer.

Up first, Haven is adding TV alum Jason Priestley, who will play Chris Weekly, a ‘handsome but anti-social marine biologist who must deal with an affliction most would consider a blessing.’ He joins Emily Rose (UNCHARTED‘s Elena Fisher), who plays Audrey Parker, a former FBI agent investigating the supernatural events called ‘The Troubles;’ Lucas Bryant, who plays Nathan Wournos, a handsome local cop with his own supernatural affliction; and Eric Balfour, who plays Duke Crocker, a local smuggler and reluctant aide in solving Haven’s Troubles. Haven is based on The Colorado Kid from renowned author Stephen King.

Next, a press release sent out last week tells that Annmarie Morais will join Haven‘s creative team as staff writer for Season 2. Annmarie is best known for writing MTV Film’s 2008 release, How She Move.

Haven’s second season is slated to premiere on Syfy July 2011.