Part 3 - Charlie speaks to Si about finally cementing himself in the Celtic first team in his 2nd season since his return to the club which included a run of form that saw him crowned Scotland's Player of the Year.
He also discusses the experience of being involved in one of the most famous victories in the club's history, Celtic's 2-1 defeat of Barcelona. Did they really believe they could win?
With great success also comes heightened expectations. Charlie details the pressures that Celtic teams face after setting themselves such high standards to maintain.