When Caroline and Max are invited to speak about their business at Caroline’s alma mater, the University of Pennsylvania, Max takes the opportunity to give Caroline the college partying experience she never had. Also, Oleg’s attempts to bond with baby Barbara are rebuffed by a possessive Sophie, and Han practices his magic tricks with a reluctant Earl as his assistant.

After coming in contact with a substance by the hand of Mad Hatter, Jim Gordon gets led on a psychedelic trip and must confront his past, present and future. Meanwhile, Penguin struggles with Nygma's new relationship.

Jane continues to work on her thesis and she decides to add Alba’s estranged sister to the narrative, much to Alba’s dismay. In order for Rogelio to have a chance at being an American crossover star he decides to bring the Passions of Santos to The CW in hopes they will pick it up. Xo thinks about abandoning her dream of being a singer for something more realistic. Luisa is forced to make a choice between her family or Rose.

On Halloween, Kevin and Donna's neighbors "trick" them in holiday style when they pretend not to be home to avoid giving out candy. Also, Chale has an altercation with a man dressed as a Viking.

Guilty and self-destructive, Lucifer clashes with Chloe during an investigation, leading her to team up with Dan instead. Meanwhile, Amenadiel bonds with Charlotte, and Maze takes Trixie trick-or-treating.

When Adam’s client offers him two highly coveted tickets to a Pittsburgh Steelers game, he is stuck between choosing to take his wife, Andi, or his brother, Don (Kevin Nealon).

Things get weird for journalist Ozzie Graham after a suspicious car accident sends him searching for answers at StarCrossed, a support group for alien experiences.

Trying to win over Ozzie, Gerry goes above and beyond what a good sponsor would do; Chelsea opens up to Father Doug about her marriage; tensions run high as Jeff, Don and Kurt prepare for the alien invasion.

Before Halloween, Team Scorpion must infiltrate a deep, vast cave system in order to prevent a bat population from destroying the North America ecosystem. Also, the team dons costumes to stage photos from Halloween’s past for Walter’s upcoming immigration inspection.

After the death of his wife, Sheriff Miller is forced into retirement and replaced by Evie Barret. Evie discovers the town is possessed by demons, and that Stan's wife was the only one keeping them at bay. Stan and Evie must join forces to stay alive.

When Kara and Alex investigate the murder of an unregistered alien, the trail leads to an alien fight club run by Roulette, the ringmaster who commands aliens to fight in mortal combat for the entertainment of rich humans. While trying to stop the fighting, Supergirl and Martian Manhunter find themselves up against a surprising opponent. Meanwhile, Hank is thrilled to have found another Martian and tries to get to know M'Gann better. Supergirl takes Mon-El under her wing and begins to train him.

Episode info coming soon ..

On the final night of knockouts, seven pairs of artists perform for the chance to make it to the live shows. Coaches Adam Levine, Blake Shelton, Alicia Keys, and Miley Cyrus are joined by two superstar advisors: Faith Hill and Tim McGraw.

Episode info coming soon ..