The Flash 7×10 “Family Matters, Part 1” Season 7 Episode 10 Sneak Peek – PSYCH THREATENS IRIS – Iris (Candice Patton) is pushed to the limit as she seeks to uncover the mysterious truth about Psych (guest star Ennis Esmer). Meanwhile, Barry (Grant Gustin) initiates a new training system, that could potentially backfire, with devastating consequences. Joe (Jesse L. Martin) and Cisco (Carlos Valdes) make life-altering decisions. Philip Chipera directed the episode written by Lauren Barnett & Emily Palizzi (710). Original airdate 5/18/2021.