Jonathan Harris interviews video installation artist Mark Boulos on his recent work Echo (2013). In this work, the viewer becomes a part of the installation as their image and sounds register and are repeated back to them, with a one second delay. Boulos discusses his inspirations, the Marxist and psychoanalytical background of the work, and his earlier works All That is Solid Melts into Air (2008) and No Permanent Address (2010). The particularities of showing his work at FACT Liverpool are also discussed, a well as the wider implications of making left-wing art.