Three International Space Station crew members are scheduled to leave the orbiting laboratory Wednesday, March 11 after almost six months in space performing scientific research and technology demonstrations.

NASA Television will provide complete coverage of their departure and return to Earth, beginning with the space station change of command ceremony on Tuesday, March 10.

Expedition 42 Commander Barry Wilmore of NASA will hand over command of the station to fellow NASA astronaut Terry Virts. At 6:44 p.m. Wednesday, Wilmore and flight engineers Alexander Samokutyaev and Elena Serova of the Russian Federal Space Agency (Roscosmos) will undock their Soyuz spacecraft from the space station and land in Kazakhstan at 10:08 p.m. (8:08 a.m. March 12 Kazakh time).

NASA Television coverage is as follows:

Tuesday, March 10

10:25 a.m. -- Change of command ceremony in which Wilmore hands over station command to Virts

Wednesday, March 11

3 p.m. -- Farewell and hatch closure coverage (hatch closure scheduled at 3:25 p.m.)

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NASA Television to Air Space Station Change of Commander, Return of Three Crew Members