A major train accident keeps the staff at Holby busy, as an influx of casualties arrives on the wards. While resources are stretched to their limit, Dom treats the disaster as a perfect opportunity to avoid his personal problems and escape into `work mode'. Bernie's husband turns her children against her as divorce proceedings continue, and as Zosia bottles up her grief, Ollie offers her a friendly shoulder to cry on - despite their break-up. Medical drama, starring David Ames and Jemma Redgrave.