Ep. 37: Esteban and Zia reach the island and face the golden-masked priest who guards the ancient secrets.
Aired on January 22, 1983

37
Esteban and Zia swim to a lake island where a mysterious high priest in a golden mask awaits them. He claims their sun medallions are keys to the Cities of Gold, fulfilling a prophecy. Olmec forces arrive and threaten Tao’s life if they are not allowed entry. The priest explains that the Heva people built these underground cities to protect their knowledge after a forgotten war with Atlantis destroyed both utopian societies using solar weapons. Kalmec argues that the city secrets are vital for his people's survival. To save Tao, Esteban places the medallions on the doors, opening them to reveal the massive City of Gold.
Episodes
- Ep. 33 · Zia visits dying Papacamayo who reveals gold cities location and Olmec threat
- Ep. 34 · Mayans fight Olmecs while Gomez and Gaspard attempt to seize the Condor.
- Ep. 35 · The children face Gaspard and Gomez at the Olmec base while Menator traps them.
- Ep. 36 · Esteban and Tao board Menator's flying machine to rescue Zia from the Olmec warriors.
- Ep. 37 · Esteban and Zia reach the island and face the golden-masked priest who guards the ancient secrets.
- Ep. 38 · Menator's machine destroys gates while Kalmec steals solar unit and kills priest.
- Ep. 39 · The City of Gold collapses as Kalmec sacrifices himself to stop the reactor meltdown.