Darius, Grace and Harris join forces to prove the president was murdered. Also, Grace tells Zoe the truth.

Grace and Darius seek answers from the President and Harris discovers deadly secrets.

Haven is stricken by a mysterious plague when animals and plants alike are destroyed by exposure to hydrochloric acid with no discernible source.

Sam enlists everyone’s help in trying to track down Dean, who can literally be anywhere. Meanwhile, Castiel may be in over his head after meeting up with an unreliable source….