(Select Actor or Writer to List Associated Episodes)
| Actors | Adaptations | Calendars | Duplicates | Numbers | Plots | Titles | Writers |
| Episode: | 0750 |
| Title: | The Lost Tomorrows |
| Air Dates: | First Run - December 5, 1977
Repeat - May 7, 1978 |
| Plot: | Two American cave explorers plan an expedition into a sacred Yucatan cavern to bring out rare artifacts in spite of warnings from the locals not to violate the sacred ground. |
| Actors: |
Mandel Kramer
Ann Williams Arnold Moss Elizabeth Lathram |
| Writer: | Stella Moss |