What's it like to leave earth to explore the unknown? How does it feel to be in space? What happens when you're in space and something goes terribly wrong? Science Channel's "SECRET SPACE ESCAPES" reveals terrifying accidents, fights for survival, and stories of close calls and near misses by the astronauts who survived them. This all-new series offers chilling accounts of the challenges of space exploration as told only by the explorers who lived them and the men and women in mission control who helped each team avert disaster. Season 01, Episode 04 - "Toxic Leak"
An astronaut is exposed to a toxic ammonia leak while performing a spacewalk to connect ISS lifelines; an astronaut's helmet fills with water, threatening to drown him.