Soyuz TM-18 was the 18th mission and the 15th long-duration expedition to Mir space station. The mission began on January 8, 1994, 10:05:34 UTC, launching Commander Viktor Afanasyev, Flight Engineer Yury Usachov and Research Cosmonaut Valeri Polyakov into orbit. They docked with Mir two days later. During their stay there, cosmonauts carried out various scientific experiments in medicine, material sciences, astrophysics etc. Station crew was visited by several Progress resupply spacecrafts, and welcomed aboard the Soyuz TM-19 crew.
The mission concluded with a safe landing back on Earth on July 9, 1994, 10:32:35 UTC.