Black Cats Don't Walk Under Ladders (Do They?) - S1.E3

By apppealing to his scientific vanity, Micky manages to lure Austin to a talk show/expose to act as a scientific consultant as host Marty Corrigan tries to discredit a self-proclaimed witch, Sabrina. However, the witch's curse apparently comes true after Marty drinks one of her ""potions"". Analysis of the potion reveals nothing, and it has no effect on anyone else. Corrigan appears to have died of an intense case of influenza. Then the witch turns up dead. Austin's investigation eventually turns up that an old colleague, Dr. Drakovich, killed Corrigan using the witch's potion as a ruse to deliver a genetically tailored ""designer virus,"" to protect his son from exposure.