Soviet Cosmonaut Sergei Krikalev stuck in space during the collapse of the Soviet Union in 1991
Unable to return home, he ended up having to stay in space until further notice.
The cosmonaut eventually returned back to earth on March 25, 1992, after 10 months in orbit - to a nation that was very different to what it was when he had left. The Soviet Union had fractured into 15 nations, presidents had changed, and even his hometown of Leningrad had become St. Petersburg.
Interestingly, at the time, Krikalev was supposed to serve in the military reserves, and was almost issued a warrant for desertion – before the army realised that their reserve soldier was not even on the planet.