Humanity’s first long-term visitor to the planet Mercury, the MESSENGER spacecraft, ended its 4-year mission at the innermost planet in the solar system after it ran out of fuel necessary to keep it in a stable orbit. Josh, Addie and Tracy talk about Mercury, the legacy of MESSENGER, and artificial intelligence in movies and, of course, Star Trek. If you saw Ex Machina or are familiar with the Original Series episode Requiem for Methuselah, you may find something extra in this episode of WtG which is, in a sense, a Requiem for MESSENGER.