Alone is an American reality television series on the History channel.
The first, second and fourth seasons were filmed on northern Vancouver Island, British Columbia, and the third near Nahuel Huapi National Park in Patagonia, Argentina.
With the exception of medical check-ins, the participants are isolated from each other and all other humans.
They may "tap out" at any time, or be removed due to failing a medical check-in.
The contestant (or team in Season 4) who remains the longest wins a grand prize of $500,000.