Best of the week's arts review. Man Booker Prize winner Anne Enright's latest novel The Forgotten Waltz details an illicit and complicated love affair; How I Ended Last Summer is a gripping, award winning Russian film, by Alexei Popogrebsky, which maroons two meteorologists in the bleak landscape of the Russian arctic; photographs that have defined modern history are on exhibition in London; Russians in space with Rona Munro's play Little Eagles, about the man who put Yuri Gagarin into orbit and a moving, BBC One, psychological thriller created by Paul Abbot, who devised the series Shameless.