Archaeologists investigating some Mayan ruins come across a blob-like monster. They manage to destroy it with fire, but keep a sample. Meanwhile, a comet is due to pass close to the Earth - the same comet passed near the Earth at the time the Mayan civilization mysteriously collapsed. Coincidence?
|John Merivale||-||Prof. John Fielding|
|Didi Sullivan||-||Ellen Fielding|
|Gérard Herter||-||Max Gunther|
|Giacomo Rossi Stuart||-||Prof. Rodríguez's Assistant|
|Vittorio André||-||Prof. Rodríguez|
|Nerio Bernardi||-||Police Inspector|