- Seymour Demonstration Forest: Route 100, Reagan, Tennessee

- The Wellington, 2630 York Avenue: Mulder’s apartment building, 2630 Hegal Place, Alexandria, Virginia
- 1100-block Homer Street: Street, Washington, D.C., Mulder drops off Scully and they both lose their tails
- SW Marine Drive, UBC: Junction of Highways 90 and 283, Washington State
- Triumf, 4004 Wesbrook Mall, UBC: Northwest facility, Mattawa, Washington, exterior
- Powertech Labs Inc., 12388 88 Ave., Surrey: Northwest facility, Mattawa, Washington, interior