: The epicenter of the rifts at the old town library has been sealed off and designated as the "MAC-Z" (or "Big Mac"), where the military has established a base camp inside the Upside Down to investigate the dimension.
: Robin Buckley uses her 500th radio broadcast to comfort the town's residents and keep them informed about the ongoing lockdown. [S5E1] Held Back
: Dr. Kay (played by Linda Hamilton) is introduced as a military official tasked with locating Eleven and overseeing operations in the Upside Down. Key Plot Points : The epicenter of the rifts at the
The fifth season of officially premiered on November 26, 2025 , with the first episode titled "Chapter One: The Crawl" . Episode 1: " The Crawl " Overview [S5E1] Held Back