dan sullivan, played by craig fairbrass, arrives in albert square as carol jackson (lindsey coulson)'s latest boyfriend in 1999 and they plan to marry on discovering she is expecting his child. carol's daughter bianca butcher (patsy palmer) is stunned to see him, as they had a fling when she was a teenager on holiday, many years before. dan and bianca begin an affair, which is discovered, leading carol to have an abortion and leave walford. bianca also leaves walford.