In this half-hour special, the I-Team re-visits some of its more than 40 stories during 2018, investigating Maine's largest utility company and a mysterious spike in usage. Thousands of Central Maine Power customers said their bills doubled or tripled and they couldn't figure out why. The I-Team asked to see those bills and hundreds of customers submitted copies. The I-Team spent days analyzing those bills and provided the data and analysis to state regulators. Hours after the data was turned over, state regulators launched an investigation.