It’s Halloween time at The Jeffersonian as the team gets a surprise visit from Lt. Abbie Mills and Ichabod Crane, who have traveled from the spooky town of Sleepy Hollow to help on a murder case of a young woman whose body is found on top of a 18th century military general’s headless body. The new foursome must figure out how to work together to discover who the 200-year-old headless corpse is and how the two murders are linked. Meanwhile, Booth and Brennan come up with the ultimate Halloween pranks to play on each other. Crossover episode with Sleepy Hollow Season 3, Episode 5.

Charlotte and Audrey work on their new plan to eliminate the troubles, but something seems to be thwarting their attempts, and it's up to Nathan and Dwight to get to the bottom of it. Meanwhile, the Teagues brothers search for the mysterious serial killer who's stalking the streets of Haven.

In an effort to get answers, Noah Bennet joins forces with Hiro Nakamura to return to the day of the tragic events of June 13, 2014 that set everything in motion. On the verge of delivering a speech to commemorate the event, Mohinder Suresh receives a dire message from Angela Petrelli about Erica Kravid's true motives. In Japan, Hachiro Otomo makes a calculated move against Hiro Nakamura. Meanwhile, a much happier Luke and Joanne come to Odessa in hopes of finding a cure to their son's ailment.

Annalise takes on a new client, a transgender professor accused of killing her husband. The Keating 5 are left to handle the Hapstall case and they discover a shocking new suspect.

Benson tries to spice up the park's annual Halloween party by renting a wish making machine.

Dr. Alex Reid must decide whether or not to use information Dr. Charlie Harris gets from a patient's spirit in order to save their life.

Fitz and Olivia are presented with a shocking plan that might just make all of their troubles go away, and Mellie is put through the ringer when confronted about her troubled marriage. Meanwhile, the Gladiators continue to defend Olivia, and Susan Ross turns to David for advice.

With Booth and Brennan in tow, Abbie and Crane set out to prove that supernatural forces are at play when a mysterious death plagues the FBI. As Pandora unleashes a force to awaken the dangerous Red Coast General Howe, both teams must find a way to save the town from the British Army of the Undead. Can the power of Booth and Brennan combined with Abbie and Crane be enough to stop Pandora’s evil forces? Crossover episode with Bones Season 11, Episode 5.

Red and the FBI come together to protect Liz when a huge reward for her capture attracts attention from assassins.

Will Forte (The Last Man on Earth (2015)); Breeders' Cup ambassador Kate Upton; Fox Sports analyst Alex Rodríguez discusses the World Series. Also: Steve Martin and Edie Brickell perform.

Just as Damon thinks he's gained the upper hand in his fight against Lily, an unexpected turn of events leaves him scrambling for a plan B. Elsewhere, when the fallout of Damon's actions gains the unwanted attention of Mary Louise and Nora, Stefan and Caroline are forced to spend the night distracting the girls at Whitmore College's Heaven & Hell ball. Finally, after suspecting that she's up to something, Enzo sets off on a mission to find out what Valerie is hiding, while a plan set by Alaric and Bonnie leaves their worlds turned upside down.