Summary: Ross (Aidan Turner) plans to expand Wheal Leisure and persuades the other shareholders to invest in a new tunnelling scheme. Meanwhile, Unwin Trevaunance (Hugh Skinner) decides that he will plant his political flag by cracking down on lawlessness, particularly smuggling. Demelza (Eleanor Tomlinson) continues to hide her pregnancy from Ross, believing that he does not want the child.With the interest now due on the promissory note Ross secured from Pascoe, Ross and Demelza have to find £400. Jud (Phil Davis) is attacked for recanting his testimony in court and left for dead. Ross accepts Francis’ (Kyle Soller) invitation to spend the Harvest festival at Trenwith, united now by a shared hatred of George Warleggan.Francis reveals to Ross he has £600 set aside which he plans to invest in mining. Dr Dwight Enys (Luke Norris) is called to Killewarren and discovers that Caroline (Gabriella Wilde) has a fishbone lodged in her throat. He removes it, impressing her, but on his way home discovers that George (Jack Farthing) has acquired more shares in Wheal Leisure.Later, Elizabeth reveals that George gave Francis the £600, making Ross suspicious as to George’s purpose. Demelza overhears the pair flirting before going to bed where Ross joins her. They argue and Demelza reveals that she is pregnant.