The remnants of an alien ship and two frozen cybernetic bodies are uncovered in the Arctic by a research team. These aliens soon thaw out and flee Earth, taking the research team with them.
A teenage killer eludes Mulder and Scully by moving too fast for the human eye to follow.
Mulder continues to search for clues about Samantha's abduction and ultimately finds the long sought after answers concerning her fate.
When a mysterious madman holds the city of Dallas hostage with a threat to release a deadly poison gas into the air, Walker and the team have 48 hours to stop him.
