• Actor Tom Mison attends day 3 of the WIRED Cafe @ Comic Con at Omni Hotel on July 26, 2014 in San Diego, California.

Actor Tom Mison attends day 3 of the WIRED Cafe @ Comic Con at Omni Hotel on July 26, 2014 in San Diego, California. (Photo : Getty Images/ Jesse Grant)

"Sleepy Hollow" Season 4 surprised fans with big changes that took place on the Fox supernatural drama series when it returned on Jan. 6, Friday, despite several spoilers. The changes were made following Abbie Mills' (Nicole Beharie) death.

[WARNING: THIS POST CONTAINS SPOILERS OF "SLEEPY HOLLOW" SEASON 4.]

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1.     "Sleepy Hollow" Season 4 begins with a new setting.

"Sleepy Hollow" left its old place, the small town of Sleepy Hollow. With new mission as the head of the secret Washington D. C. -based organization., Ichabod Crane (Tom Mison) will continue his evil hunting in the nation's metro. He is set to unearth something about the Lincoln Memorial, TV Line reported.

Ichabod will be seen moving to his new home in Washington, which unfortunately is a haunted house. After Abbie's passing, Ichabod and Jenny Mills (Lyndie Greenwood) will continue to search for the next Witness in the capital. 

2.     The new season welcomes a new villain.

The first three seasons of "Sleepy Hollow" saw Ichabod fighting against villains Moloch or "the God-Demon of Child Sacrifice" (D.J. Mifflin, Derek Mears) and Pandora (Shannyn Sossamon). The fourth run of the Fox supernatural series welcomes a new antagonist, who, unlike the two previous villains is a human.

Malcolm Dreyfuss (Jeremy Davies) is a rich businessman who likes unleashing evils in the capital. He is the one, who freed the evil that killed Agent Diana Thomas' (Janina Gavankar) partner. He has a vast knowledge about the supernatural that makes him one of the main enemies of the second Witness in "Sleepy Hollow" Season 4.

3.     Viewers will meet the new Team Witness.

As soon as Ichabod moved to Washington D.C., he encountered an evil crime, where he met Agent Diana, who is chasing the evil that killed her partner. The two met Jake Wells (Jerry MacKinnon) and Alex Norwood (Rachel Melvin) in The Volt, a secret agency that fights against the supernatural.

Season 4 introduces the new team Winess composing of Wells, Norwood and Agent Diana under Ichabod. The Volt office will serve as the team's headquarter that has similar creepy designs like Sleepy Hollow.

4.     The new Witness may not be Agent Diana.

Previous "Sleepy Hollow" Season 4 spoilers have revealed that Agent Diana may be the second Witness after Abbie died. However, a shocking twist contradicts the speculations.

New spoilers suggest that Agent Diana's 10-year-old daughter Molly (Oona Yaffe) may be the next Witness, according to Cinema Blend. At the exact time of Abbie's demise, Molly fainted and was not able to talk right after the incident.

Molly also has the ability to draw Ichabod's face, despite the fact that they have not met. All these clues may suggest that Ichabod and Jenny are on their way of finding the next Witness in "Sleepy Hollow" Season 4.

5.     Ichabod's son will reappear in the new season.

Ichabod's long lost son Henry Parrish (John Noble) will be seen in several episodes of "Sleepy Hollow." Henry, a sin-eater and a witch, appears in an 18th century British court, where his father is put on trial for murder. He uttered the lines "Hello father" in the teaser video.

Watch the trailer of "Sleepy Hollow" Season 4 episode 1 below: