The Terror, coming to BBC Two in March, is a must-watch historical epic with a supernatural twist. Starring Jared Harris, Tobias Menzies and Ciaran Hinds, the critically acclaimed drama blends the true story of Sir John Franklin’s doomed expedition with Dan Simmons' novel The Terror and brings to life the last days of the two famous ships – HMS Terror and HMS Erebus - and their crews. But what really happened in 1845 and where does the true story end and the TV series begin? Here’s our guide to the real story of the HMS Terror. HMS Terror and HMS Erebus before 1845