Further adventures of the explorers gang of the TV series, encountering ape men, dinosaurs and a tribe of albino underground dwellers.
| Actor | Role |
|---|---|
 Peter McCauleyProfessor George Challenger | Professor George Challenger |
 Rachel BlakelyMarguerite Krux | Marguerite Krux |
 William SnowLord John Roxton | Lord John Roxton |
 David OrthNed Malone | Ned Malone |
 Jennifer O'DellVeronica Layton | Veronica Layton |
 Michael SinelnikoffDr. Arthur Summerlee | Dr. Arthur Summerlee |
 Lara CoxFinn | Finn |