This episode goes back to the Victorian era to tell the true story of Charles Dickens' life. During the 19th century, Dickens was an international celebrity with journalists camped at his house and fans desperately trying to give him locks of their hair. Ollie Dickens, the author's great-great-great-grandson, discovers that his infamous ancestor had a dark secret that a fatal rail crash in Kent in 1865 almost exposed. Travelling with Dickens was Nelly Ternan, a little-known actress. Her descendant, Marcus Allen, discovers that she was Dickens' mistress and that their secret affair could have destroyed Dickens' reputation and the sale of his books. Joy Hillday uncovers her ancestor Henry Benge's role in the disaster. Benge was in charge of the team of workmen who maintained the track on the day of the crash. An official inquiry reveals the tragic consequences of the crash.