Jennifer-Juniper Angeli

Bex and the team race to catch Mark Marsden, a handsome and charming serial killer who murdered three of his wives in cold blood.

Regina attempts to transport herself and Henry back to Fairytale land -- which includes a fail-safe that could wipe Storybrooke and its inhabitants off the face of the earth -- and Emma’s suspicions about Tamara grow.

Dr. Murphy questions his decision to give the new residents autonomy when an intern's misdiagnosis has dire consequences; a patient has a ruptured cyst affecting key functions of her brain; Dr. Morgan Reznick and Park bond over failed relationships.

Stella Kidd returns to Firehouse 51. The team must work together to put out a potassium fire in a tunnel. After that incident, Ritter begins to worry about a young cop who witnessed the fiery death of a truck driver.

Kennex and Dorian respond to a suspicious death at a hospital where – before having a fatal cardiac arrest – a man claimed someone was trying to kill him, and inexplicably knew his exact time of death. As the investigation unfolds, a black market for vital organs is uncovered in which bio-mechanical hearts can be resold and remotely "shut off." As the team fights to find the pulse of this 2048 tech-centric crime, Dorian reconnects with a decommissioned DRN.