From the liner notes

A devastating earthquake has shattered more than the crystal matrix table! Rick Marshall has been torn away from his children... Chak-Ka faces life without his elders...High Bluff - the family cave - lies buried beneath tons of debris... Yes, nothing will ever be the same for Will and Holly. The expedition just got a whole lot less routine! Relive the fortuitous arrival of Uncle Jack. Pitch in and construct a new base camp among ancient temple ruins. But you had better hurry! Never before has the surrounding world been quite so deadly! Dangers and more await rediscovery as you once again lose yourself in the unending struggle to escape the Land of the Lost.

Episodes:
After-Shock, Survival Kit, Orb, Repairman, Medusa, Cornered, Flying Dutchman, Hot-Air Artist, Abominable Snowman, Timestop, Ancient Guardian, Scarab, Medicine Man