Expedition 27 began with the Soyuz TMA-01M undocking on March 16, 2011. Three new crew members arrived April 6, 2011 on Soyuz TMA-21.

Soyuz TMA-20

Crew: Dmitry Kondratyev, Catherine Coleman, Paolo Nespoli

Launch: Dec. 15, 2010, 2:09 p.m. EST (Dec. 16, 1:09 a.m. Kazakhstan time)
Docking: Dec. 17, 2010, 3:11 p.m. EST
Landing: May 23, 2011, 10:27 p.m. EDT (May 24, 8:27 a.m. Kazakhstan time)

Soyuz TMA-21

Crew: Andrey Borisenko, Ron Garan, Alexander Samokutyaev

Launch: April 4, 2011, 6:18 p.m. EDT
Docking: April 6, 2011, 7:09 p.m. EDT
Landing: Sept. 15, 2011, 11:59 p.m. EDT (Sept. 16, 9:59 a.m. Kazakhstan time).