Mary must marry again in order to help Scotland, whose welfare she has to prioritize over her heart. Meanwhile, Catherine is accused of poisoning Francis, but Mary believes Catherine is…

Cassandra mysteriously falls ill, sending SG-1 back to her home planet — where they uncover a dark Goa’uld secret.

A group of primitive aliens begin to fall deathly ill after SG-1 arrives.

President Kirkman is faced with a viral pandemic that threatens to kill countless Americans; Hannah and Damian discover evidence that could change the lives of members of the first family…

Despite Dean’s directive to forget about looking for a cure for the Mark of Cain, Sam continues to do research. Dean suspects Sam is hiding something but decides to focus…

Sam meets a woman who shares his ability to have visions, and she warns him that she has seen the future… where he dies in an explosion.