On a snowy February day in 2018, Canadian firefighter Danny Filippidis vanished from a New York ski slope only to mysteriously reappear six days later at a California airport with no memory of how he traveled 2,500 miles across the country.

On a snowy February day in 2018, Canadian firefighter Danny Filippidis vanished from a New York ski slope only to mysteriously reappear six days later at a California airport with no memory of how he traveled 2,500 miles across the country.