Of course a show about firefighters will be cast with *hot* stars, and here's the final one.

The 10-episode "Grey's Anatomy" spinoff, set in a Seattle firehouse, just added Alberto Frezza to the team. He's best known as Deputy Garrett Sykes in Freeform's brief horror series "Dead of Summer."

According to TVLine, his character's name is Ryan. Deadline added that Ryan is a police officer ... so, not a firefighter? Another man of the law, it seems.

Frezza is the final series regular coming to the show, following the previously announced stars Jaina Lee Ortiz, Miguel Sandoval, Grey Damon, Jay Hayden, Okieriete Onaodowan, Danielle Savre, and Barrett Doss. That's not even counting Jason George's Dr. Ben Warren, who is truly making this a spinoff by leaving "Grey's Anatomy" this season to spin-off onto the new show.

The as-yet-untitled series will debut as a backdoor pilot at some point this fall during "Grey's Anatomy" Season 14. The show will then premiere midseason 2018.

"Grey's Anatomy" airs Thursdays at 8 p.m. on ABC.

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Grey's Anatomy TV Show Poster
Grey's Anatomy
ABCTV14March 27, 2005
Based on 5 critics

Some doctors at a hospital in Seattle -- including several who began their careers at the facility as interns -- try to balance life and work. Read More

Dead of Summer TV Show Poster
Dead of Summer
TV14June 28, 2016
Based on 11 critics

Counselors at a seemingly idyllic Midwestern summer camp contend with an awakening evil. Read More

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