Ad Astra, the existential sci-fi drama from director James Gray, stars Brad Pitt as astronaut Roy McBride, tasked with locating his missing father, Commander H. Clifford McBride (Tommy Lee Jones). Clifford disappeared on a mission to the edge of the solar system to search for intelligent alien life 16 years earlier, and surges from his supposedly abandoned space station are threatening human life on Earth with no less than total annihilation. So, no pressure, Roy. [caption id="attachment_777244" align="alignright" width="350"] Image via 20th Century Fox[/caption] Despite the urgency of the premise, the film itself is slow-…