Complete story — includes the ending
An artificially induced 9.2-intensity earthquake along the San Andreas Fault triggers a massive tsunami that effectively wipes out Los Angeles, killing upwards of 9 million people. During the backstep, Parker unknowingly picks up an extraterrestrial hitchhiker (David Mylrea) in the sphere and fails to travel back in time. The entity, what the Project Backstep team comes to refer to as a "gremlin", wreaks havoc around Never Never Land, distorting time and destroying equipment. After tempting the gremlin into the sphere and backstepping without the hatch, Parker returns the gremlin to its dimension and averts the LA disaster.
Sources and content license
Source and revision history · Adapted from Wikipedia contributors, List of Seven Days episodes. HTML formatting and reference markers removed. · Content license