Broadcast live from Mission Control in Houston, Dermot O’Leary presents an unrivalled view into life aboard the International Space Station.

This episode features the astronauts celebrating Thanksgiving, and follows them as they take a space walk to deal with the potentially life threatening situation of a broken valve on the International Space Station.

New astronaut Luca Parmintano arrives at the International Space Station for a five and a half month mission. The astronauts face a dangerous situation when Luca's helmet becomes flooded during a space walk.