Gary's the man behind the music of James's youth and James is out to get up close to his pop hero and discuss everything, from the height of his Take That fame to the lows of being cast aside by the industry he loved.
Mr Barlow's been around for nearly 25 years, and as James finds out, it hasn't always been easy – there have been dark times too, but they've provided huge inspiration for some pretty memorable lyrics.
They'll visit key places in Gary's career from the working men's club where Gaz first performed to the nightclub where TT first auditioned. And James will even get to join in band rehearsals.
With contributions from Elton John, Chris Evans, Robbie Williams, and Gary's lovely mum, we'll get the full lowdown on Gary's remarkable career.
When Corden Met Barlow, BBC1, 9pm
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