Jonny Gibb, 39, has reportedly been accepted back into Lothian and Borders Police after he found the millionaire lifestyle too tame.
Mr Gibb braved shark-infested water, crocodiles and poisonous frogs to win the seven-figure prize, and left CID to enjoy his winnings.
He climbed Mount Kilimanjaro, trekked through Asia and volunteered at an Indian leper colony before pursuing other career options, including as a DJ and a failed bid to become an STV presenter.
A friend reportedly said: "He's not going back for financial reasons as he has been very sensible with the money. He's just a bit of an action man."
Police reportedly accepted Mr Gibb's reapplication before the force's recruitment freeze.