Classic Doctor Who

Ian Chesterton and Barbara Wright, two school teachers, become curious about the personal life of their exceptionally intelligent student, Susan Foreman, as well as her mysterious grandfather.

The TARDIS takes off and travels back to Stone Age times, where the crew and Susan's teachers make the mistake of venturing outside.

The Doctor and his companions leave the TARDIS to explore their new surroundings, but are soon captured, thrown in a cave, and threatened with death.

The Doctor and his companions use guile and cunning to escape death at the hands of their Stone Age captors.

The TARDIS lands inside an Aztec temple in 15th Century Mexico and become cut off from the ship when they leave the temple to explore their surroundings.

The High Priest of Sacrifice, Tlotoxl doubts Barbara's claim to be the reincarnation of Yetaxa and plans to undermine her position and eliminate her allies.