The Flash 7x01 - Season 7 Episode 1 - Clip - "All's Well That Ends Wells" Season 7 Episode 1 Sneak Peek - SEASON PREMIERE - When an experiment to save Barry's (Grant Gustin) speed backfires, Nash Wells (Tom Cavanagh) searches for a way to save The Flash and comes up with a dangerous plan.
Meanwhile, Iris (Candice Patton) makes a startling realization inside the Mirrorverse and Cecile (Danielle Nicolet) faces off with Rosa Dillon (guest star Ashley Rickards).
Alexandra La Roche directed the episode written by Sam Chalsen & Lauren Certo (#701).
Original airdate 3/2/2021.