The Sleestak are fictional reptilian humanoids from the television series Land of the Lost, which originally aired in the 1970s. They inhabit a prehistoric world filled with various creatures and are known for their green, scaly skin, large eyes, and distinctive hissing sounds. The Sleestak are often portrayed as primitive and hostile, posing a threat to the show's main characters. In the series, the Sleestak live in a temple and are depicted as guardians of ancient technology. Their society is characterized by a lack of advanced communication, relying instead on their instincts and basic social structures. The Sleestak have become iconic in pop culture, representing the blend of adventure and fantasy in the show.