This was the first season of the series filmed and broadcast in high definition .
"Topic 10: Greatest Loser" (or ) premiered in 2010 with the theme "Pay It Forward." This season expanded the show's reach beyond the ranch, with trainers Bob Harper and Jillian Michaels traveling to seven U.S. cities to motivate entire communities toward health. Season 10 Highlights 10 : Greatest Loser
Season 10 is available for purchase or streaming on Amazon Prime Video in various regions. This was the first season of the series