Film portrays the expedition of the British explorer David Livingstone to Africa to discover the source of the Nile, his disappearance, and the expedition to find him led by Stanley.
| Actor | Role |
|---|---|
 Percy MarmontDavid Livingstone | David Livingstone |
 Marian SpencerMary Moffatt | Mary Moffatt |
 James CarewGordon Bennett | Gordon Bennett |
| PPamela StanleyQueen Victoria | Queen Victoria |
 Hugh McDermottH.M. Stanley | H.M. Stanley |