A telly debut for Ritchie

" Ritchie, a retired headmaster from the Highlands who wants to get his sweet tooth under control.

Will 12 weeks be enough time to turn their lifestyles around and get the results they want? And will they really be able to keep their efforts undercover until the time comes to step out of their secret suits and show off their new bodies to an audience of loved ones?"  

All on the telly on the 11th of January.