“Sleepy Hollow” has revamped itself yet again in Season 4. After killing FBI Agent Abbie Mills, played by Nicole Beharie, the Fox series has changed its cast, setting and creative direction to infuse new life into the plot and characters.

Although Beharie, Lance Gross (who played FBI Agent Daniel Reynolds) and Jessica Camacho (who played FBI Agent Sophie Foster) will no longer be part of the supernatural drama, Season 4 has added several interesting actors.

Below are four things you need to know about “Sleepy Hollow”:

1. Episode 1 Is Titled “Columbia”

The executive producer of “Sleepy Hollow,” Albert Kim, revealed the title of the Season 4 premiere in a tweet. “Columbia” is most likely a nod to the District of Columbia, which makes sense given that the series is moving its setting from New York to Washington, D.C.

2. “True Blood” Actress Janina Gavankar Replaces Nicole Beharie

Gavankar will essay the role of Diana, a Secret Service Agent who does not believe in the supernatural world, TVLine reported last month. Naturally, she will have some initial conflicts with Ichabod Crane (Tom Mison) since she does not believe in demons, monsters or ghosts. Nevertheless, the two witnesses will eventually get along in “Sleepy Hollow.”

Diana is also a single mother to a 10-year-old daughter named Molly Thomas, TVLine reports. Like Abbie Mills, she is headstrong, a go-getter with a sense of humor.

3. Ichabod Crane Fights A New Villain

“Sleepy Hollow” has tapped “Lost” alum Jeremy Davies as Malcolm Dreyfuss, an eccentric billionaire who will lock horns with Crane.

4. Crane And Diana Make Some New Allies

Of course, the witnesses always have help in fighting evil. “Awkward” actress Rachel Melvin has been cast in Season 4 as Alex Norwood, an engineering prodigy who handles supernatural artifacts and machines in Washington, D.C.

Furthermore, “Empire’s” Jerry MacKinnon has been cast as Jake Wells, a man who catalogues information and news about the supernatural world.

“Sleepy Hollow” Season 4 will air in early 2017.

Sleepy Hollow "Sleepy Hollow" has changed its setting and most of its cast in Season 4. Photo: Tina Rowden/FOX