Holmes and Watson investigate a mass murder when a chef and his patrons are poisoned after dining on a tasting menu tainted with snake venom. Also, Detective Bells crush on a work colleague makes Holmes realize his and Fionas relationship is at an important crossroads.
Emma and Regina formulate a plan to trap the Evil Queen in a prison of their own making, while Snow and David adjust to life without each other. Meanwhile, Zelena agrees to help Belle, and together they enlist Aladdin to steal a magical object from Mr. Gold that could protect Belle and her unborn child from him forever.
Following Truman Marsh replacing Hulk with Red Hulk, the Avengers must stop Leader from building and unleashing his secret weapon.
Ash wakes up in an asylum and a seemingly helpful doctor tries desperately to get him to admit his horrific acts so his healing can begin. Ash's world seems to crumble around him.
Fiona learns that owning a laundromat is costlier than expected. Frank helps Liam get into a plush new school after his old one is permanently shut down. Meanwhile, Debbie cleans up her act and grows closer to Neil.
The team's investigation into the electrocution of a college student working on a classified Navy project leads them to his inquisitive daughter, who may be the key to accessing his work.
When Lou is given a horse, Amy helps her sister nurture a connection with the animal while Lou wrestles with the implications of the unexpected gift.
With Theresa's assistance, Charlotte Hale aims to expose dangerous flaws in Ford's creations. William, Dolores and Lawrence journey into treacherous terrain. Maeve delivers an ultimatum to Lutz and Sylvester. With his back to the wall, Bernard considers his next move.
Athena travels to the UK and her tragic secret is revealed. Niska's consciousness assessments begin. With more time at home Joe notices Sophie's increasingly eccentric behaviour. As Karen returns to work with Pete, cracks start appearing in their relationship. The Synths are forced to leave their hideout but Mia shocks them with a huge decision.
Gary meets a magical visitor from another planet and is told to cut him into pieces.
Everyone processes the aftermath from Lisa Nicole's party. Simone reaches out to Quad. Genise reveals to Toya that she doesn't find Heavenly so heavenly. Lisa takes her complaints about Toya's behavior to Mariah who has decided to throw a new beginnings party and invite all the ladies.
Daniel teams up with Esther Krug of the BfV to prevent the next Shaw leak involving a foreign defector. Valerie and Robert spar over strategy as her investigation into Iosava gains traction Hector gets a late-night visit from Shirley Pimple.
The Kilchers gather for Thanksgiving dinner at the old family barn and show thanks to friends and family that helped out in the past year.
When Elizabeth discovers that a terrorist bombing at an Illinois coffee shop was funded by someone with close ties to the Saudi government, she makes a bold move after the Saudi ambassador refuses to bring the man to justice. Also, Matt refuses to issue a statement when news breaks that he and the bomber are linked to the same mosque, and Henry reaches out to Dmitri when he hears hes having trouble adjusting to his new life in Phoenix.
On the eve of Vivian and Moby's wedding, Walter gets tangled up in a private detective's web of conspiracy. Meanwhile, Celia's new lover brings Jim to his breaking point.
Tandy wants to learn about Lewis' past, while Carol asks Gail a favor and Todd helps Melissa deal with her mental state.
Elizabeth calls Anna and Gino back from Italy to set her plan against Regina in motion, but Gino disapproves of her using Rose. George and Regina return to Inverness from Canberra, unaware of the trap Elizabeth has laid.
Ryan interferes with an autopsy to stop Helen from getting closer to the truth. Philip deals with a surprise visit from his mom. Lukas struggles with anxiety about the murders.