4x19 - The Flying Doctors

Emma's schoolmate Jenny comes to Coopers Crossing to visit Emma and Sam. She's acting really strange and Emma convices her to see Geoff. It turns out she's got anorexia, but she refuses to admit it. But finally she realizes it's for the best and goes for treatment. A mining company suspects there might be some minerals at Sam and Emma's property and they think about what they will do with all the money. In the end there wasn't any minerals worth extracting.