Lock Martin, a former hotel doorman, was cast as Gort due to his impressive height of 7 foot, 7inches.
From within the ship, Gort steps out and vaporizes all the weapons, but leaves the humans unharmed.
Klaatu orders Gort to stand sentinel at the ship while Klaatu is taken to the hospital for treatment.
Gravely wounded, Klaatu tells Helen to take him to Gort and tell Gort "Klaatu Barada Nikto."
Klaatu perishes before Helen can get to the saucer, but Gort takes Helen and Klaatu and tucks them away safely.
She tells Gort the phrase and Gort pauses from his mission to destroy the humans who attacked Klaatu.
The Lost-in-Space Robinsons employed their robot as a sort of general factotum, and even Gort, of Klaatu Barada Nicto fame, was only following orders.
Gort - From the 1951 film The Day the Earth Stood Still, this plain yet terribly dangerous alien robot revealed how weak humans could be when facing superior technology.
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