S37·E77 Episode 4964 (Wed 16th Apr 2008)

Hilary ropes Doug into visiting the hospital with her to discover more about Daniel's medical history, and a sympathetic Dr Marshall agrees to investigate. Later on, Ashley and Laurel are stunned when the doctor arrives to say there is an anomaly in Daniel's records. Explaining further, Dr Marshall delivers the startling news that Laurel and Daniel's blood groups are incompatible, therefore she cannot be his mother and Laurel is left reeling from the news.