Expedition 25

Expedition 25 was a 2010 International Space Station resident increment commanded by NASA astronaut Douglas Wheelock. The expedition began when Soyuz TMA-18 departed on September 25, leaving Wheelock, Fyodor Yurchikhin, and Shannon Walker aboard the station after their Expedition 24 work. Soyuz TMA-01M arrived in October with Aleksandr Kaleri, Oleg Skripochka, and Scott Kelly, restoring the outpost to a six-person crew and marking the first crewed mission of the upgraded Soyuz TMA-M spacecraft. The crew supported a broad research program, Progress cargo operations, and station maintenance while the ISS passed ten years of continuous human presence. During the increment, Yurchikhin and Skripochka performed a Russian-segment EVA to install external hardware, clean and remove experiment equipment, and work around Zvezda, Poisk, and Rassvet. Expedition 25 ended when Wheelock, Yurchikhin, and Walker returned to Earth on Soyuz TMA-19, while Kelly, Kaleri, and Skripochka continued into Expedition 26.