Jennifer-Juniper Angeli

Stella Kidd returns to Firehouse 51. The team must work together to put out a potassium fire in a tunnel.

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.

Hook helps Regina with a plan to transport her and Henry back to Fairytale land; Emma grows increasingly suspicious of Tamara; the queen asks Rumplestiltskin to transform her so that she can kill Snow White.

When Kennex and Dorian investigate a strange death at a hospital, they discover a black market for vital organs; Dorian reconnects with a decommissioned DRN.