A power failure occurs on the ISS forcing the crew to consider abandoning the station, although damage has been found on the shuttle that could comprise them upon reentry. During the first spacewalk a cosmonaut is nearly stranded after a suit malfunction.

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A toxic leak threatens the lives of astronauts; a crew suffers from depressurization; and an engine malfunctions at takeoff.

In 1997 on board the Russian Space Station Mir a collision put a hole in the station and the vacuum of space bares down; another astronaut's first spacewalk becomes a nightmare when he and his partner have only the oxygen in their suits to survive.

An astronaut loses his vision and is locked outside his craft after a spacesuit malfunction during a spacewalk; a fire on the launchpad threatens cosmonauts; and a space shuttle is aborted seconds before launch, but the crew doesn't know why.

In 1997 astronauts and cosmonauts Alexsandr on MIR deals with a life-threatening cabin fire and an out-of-control cargo ship; In 2001 astronaut Chris Hadfield's rookie spacewalk takes a terrifying turn leaving him temporarily blinded in space.

A toxic ammonia leak endangers a crew; and a space walk goes wrong when an astronaut's helmet fills with water. Also: a cosmonaut is stranded in the wilderness after narrowly surviving re-entry.

A Space Shuttle crew discovers damage to protective tiles on the shuttle's underbelly that could kill them during re-entry in temperatures up to 3000 degrees.