Doctor Who and the Warlord

Doctor Who and the Warlord is a text-based adventure featuring an unspecified Doctor (possibly sixth, as this was at the time) released for the BBC Micro. The game loaded in two parts, with a password and information from the first half needed to successfully continue into the second part. Each part was recorded on one side of the cassette. There were over 250 locations in each. (wikipedia.org)