This flight delivered ISS Commander Pavel Vinogradov and ISS Flight Engineer Jeffrey Williams to the station to replace Expedition 12 crew members. Flight Engineer Marcos Pontes joined the TMA-8 crew for the ascent and docking with ISS, spent approximately seven days aboard the ISS conducting experiments, then returned to Earth with the outgoing members of Expedition 12 aboard Soyuz TMA-7. 30 March 2006