Episode Behind the Scenes

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First and only appearance of the Gorn until "Star Trek: Enterprise's" episode "In a Mirror, Darkly, Part II", but by the time that episode aired, the Gorn was completely computer generated.
When the Enterprise crew watch Kirk on the viewscreen, in one shot well after he's arrived on the planetoid, there's an empty shot of a mountain landscape. Then Kirk pops in out of nowhere, hobbling along.
Vic Perrin, who plays the voices of both the Gorn and the Metron, previously played the voice of the "child" Balok in "The Corbomite Maneuver" and would later voice the role of Nomad in "The Changeling".