Expedition 23 began with the Soyuz TMA-16 undocking on March 18, 2010. Three new crew members arrived shortly thereafter on Soyuz TMA-18.

Soyuz TMA-17

Crew: Oleg Kotov, Soichi Noguchi, T.J. Creamer

Launch: Dec. 20, 2009, 4:52 p.m. EST
Docking: Dec. 22, 2009, 5:48 p.m. EST
Landing: June 1, 2010, 11:25 p.m EST

Soyuz TMA-18

Crew: Alexander Skvortsov, Mikhail Kornienko, Tracy Caldwell Dyson

Launch: April 2, 2010, 12:04 a.m. EDT
Docking: April 4, 2010, 1:25 am EDT
Landing: Sept. 25, 2010, 1:23 EDT