The doctors of Grey Sloan Memorial Hospital will get a visit from a group of firefighters that bring their own drama to season 10 of Grey's Anatomy, according to a Thursday spoiler by TV Line.

The season 10 premiere episode will involve a group of firefighters serving several guest-starring roles, including one fireman's fiance, that will span two episodes. There might also be a two-part feel to the ABC drama's premiere, according to the report. There is a possibility of a two-hour premiere, which is what took place for seasons 5, 6 and 8.

Associate Casting Director on Grey's Anatomy, Jamie Castro, tweeted on Friday that casting is underway for the show, though she did not specific for which roles. Production planning for the new season started and the show's creator, Shonda Rhimes, tweeted on Thursday that some scripts are already completed.

"Scripts for first two GA episodes are On deck and ready to go!! Excited about them!!" she wrote.

Sarah Drew, who plays Dr. April Kepner on the show, tweeted the same day, "Spent some time with the writers on Monday hearing about season 10 for April!! So excited!" The cast will have a table read on July 15, confirmed by Drew. She also tweeted that filming will begin on July 17.

A Grey's Anatomy writer, Tony Phelan, said on Wednesday that the show's writers room is hard at work. He added, "Get ready for a crazy, shocking roller coaster ride! The first four episodes of Season 10 deliver!!"

As far as a set premiere date for season 10, co-producer Karin Gleason said it will air on ABC sometime in September in the U.S. The network has yet to official announce their fall 2013 TV show lineup. When in season, Grey's Anatomy airs Thursdays at 9 p.m. ET.

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