Noah returns to help Grace with A.J., offering her stability. Bishop and Lady Mae take a walk through their history when they visit Mavis’s club as a potential venue. Jacob…

Grace pushes forward in her investigation into Bob Whitmore’s former company, Edenvale Lending, discovering a key informant who could unlock the answers.

The team reaches the mobile lab, which turns out to be a submarine. Murphy says goodbye.

The team meets La Reina, Queen of the Zeros, after being captured. Dr. Kurian is ready for human trials on his Z-vaccine at the Zero compound.

It’s discovered that the Z-vaccine doesn’t work. Vasquez gets caught trying to kill Escorpion; Murphy uses mental manipulation to help Roberta.