"Gilligan's Island": The Little Dictator (TV Episode 1965)
Episode aired 30 September 1965
Gilligan's Island The Little Dictator S02E03
You can see Indians at the 21:32 mark.
The setup is that Gilligan is dreaming about being a Latin American dictator. Everyone shows him glimpses of "his" country through a window, including Ginger aka Secret Agent 0036. The scene goes like this:
GINGER: And I say it's in terrible shape. Take a look.
Gilligan looks at her bikini-clad body.
GINGER: Not at me. At the state of the country.
He looks out as whooping and yelling fill the air. He sees rampaging Indians on horseback, many wearing headdresses, from an old Western movie.
GILLIGAN: That must be the window facing the west.