Increment 25 NASA astronaut Doug Wheelock, the Expedition 25 commander, Russian cosmonaut Fyodor Yurchikhin, and NASA astronaut Shannon Walker arrived to the ISS in the Soyuz vehicle 23S. They were on the ISS for roughly two weeks, adjusting to life in space before Soyuz 24S brought three additional crewmembers to the station forming the full Expedition 25 crew of six. These three were Russian cosmonauts Oleg Skripochka and Alexander Kaleri, and NASA astronaut Scott Kelly.
During Increment 25 vehicle traffic included the docking of Soyuz 24S (to deliver the three additional Expedition 25 crewmembers), the docking of Progress 37P and the undocking of Progress 40P.
Expedition 25 ended with the undocking of Soyuz 23S at the end of November 2010, returning Wheelock, Yurchikhin, and Walker to Earth after a five-month stay on ISS.