Even for a show focused on weight loss, it's been a remarkable season of startling transformations.
Tonight, the season finale of “The Biggest Loser” airs on NBC.
Along with massive weight loss, the show has also seen its oldest woman and oldest man make it to the final four.
Of the four competing for the big prize, two are a father and son team, now competing against each other.
That will mean outshining a couple of women who've turned their lives around by dropping tons of weight.
The winner will get to experience life with an extra $250,000.
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