By Rhonda Johnson
Updated August 13, 1999 at 04:00 AM EDT

A deep-sea discovery gone awry forces a space station to be quarantined as NASA and the Army’s infectious-diseases unit battle over the fate of astronauts infected with a DNA-mutating virus that could destroy humanity. Dr. Emma Watson is the onboard physician whose soon-to-be-ex-husband fights both a White House assassination directive and a swift incubation period in an attempt to find a cure and fly it to the orbiting station. A Sphere in an Abyss spawns an Alien Outbreak? Sci-fi film flashbacks aside, in Gravity, physician-turned-novelist Gerritsen (Bloodstream) treats us to some of the best medical gore and speculation about extraterrestrial life found anywhere outside The X-Files.