The X-Files S01 Ep01 'Pilot'

Agent Dana Scully is assigned to work with Agent Fox Mulder on the X-Files in an attempt to debunk his work on the paranormal. Their first case has them investigating apparent alien abductions. A near comatose man, Billy Miles, is taking his classmates, including Theresa Nemman, into the woods, where they are killed in a flash of bright light.