A chemistry teacher’s science experiment goes horribly wrong.

The remnants of an alien ship and two frozen cybernetic bodies are uncovered in the arctic by a research team. These aliens soon thaw out and flee Earth, taking the…

A gas tanker explodes on a Seattle highway, causing multiple injuries, including paramedic Matthew. Meredith and Jo help a frantic mother whose child is suffering from a mysterious illness. Owen…

Agent Brody and Paige investigate when they discover that the demon Sarpedon is capturing innocents’ guardian angels and using them to protect himself from the new power. Meanwhile, Piper and…