The Congo was a region in central Africa associated with the Petro gods. (PROSE: White Darkness) The Congo River and the Democratic Republic of Congo were located in this region.
In 1842, Abasi was born in the Congo. In 1851, Professor Cedric Scrivener brought him back to the United Kingdom to work as his servant. (AUDIO: The Ghosts of Gralstead)
The Congo reminded Leela of her home planet. (AUDIO: The Ghosts of Gralstead)