It just struck me watching the funeral episode. He is way too handsome and good an actor for a throwaway part. If I am wrong I hope they rewrite it lol. If I am correct then Fallon’s marriage to “Liam” would be invalid and so her marriage to Jeff would be valid and she would have to hand over her Carrington Atlantic shares to Jeff who would win after all.
It makes sense : original Fallon and Adam shared a kiss before learning they are siblings so reboot ones can easily be married ! ^^... The Lady (*sitting close to Joseph at the Church*) who is looking him can be a member of Carringtons (Blake or Tom) staff : the children's nanny who recognizes him !... If your theory is true, I hope that Liam isn't aware that he is actually Adam !