6:02 AM EST

Summary

The beginning of the end is triggered when Walternate finds a way to wreak havoc “over here."

Guest stars

• Seth Gabel as Lincoln Lee
• Ryan McDonald as Brandon Fayette
• Kevin Corrigan as Sam Weiss
• Heather Doerksen as Major Warner
• Don Ackerman as ER Doctor
• Forbes Angus as Science Director
• Richard Ian Cox as Donnie
• Matt Ellis as Richie
• Gigi Friedman as Jean
• Jennifer Koenig as Nurse Gail