4. The mistake that cost $1 million dollars
On Survivor: The Australian Outback, Colby snagged the last Immunity Idol, gaining access to the Final Tribal Council. He chose fellow castaway Tina to come along with him. His good deed backfired when the Council Jury decided that Tina's skilled strategy was more deserving of a win than Colby's prowess in challenges.
Relive Survivor: The Austalian Outback on CBS All Access.