were the perfect foursome. they were even labeled the fab four. and it did look as though they were all getting along really, really well. >> but soon, stories began to leak. that there was tension, behind palace doors. >> they had a good relationship, the three of them. then meghan arrived, and i think that was when things started to go wrong. harry fell head over heels. harry is a very impetuous sort of person. william is very much more considered. he is very controlled in what he does, and i think he looked at harry moving very, very quickly towards marriage and just said hold on a minute. are you sure you're not going too fast here? >> you look at harry and william's parents. they didn't take huge amount of time to get to know each other. that marriage was not