The "Test Drug"

The "Test Drug" is the drug that Ethan and Daisy were assigned by the company to research and document. John Herrin was targeted as the main vessel for the drug, but Daisy, who was in charge of administering the drug to John, was caught by Cate. Daisy tried to silence Cate, but Cate was able to stab Daisy with the syringe that contained the drug.