123Movies. Based on Robert Heinlein’s 1941 story “Universe,” Double Lunar Dogs presents a vision of post-apocalyptic survival aboard a “spacecraft,” travelling aimlessly through the universe, whose passengers have forgotten the purpose of their mission. As a metaphor for the nature and purpose of memory, the two main characters (portrayed by Jonas and Spalding Gray) play games with images of their past; but their efforts to restore their collective memories are futile, and they are reprimanded by the “Authority” for their attempts to recapture their past on a now-destroyed planet Earth.