Knicks guard Walt Frazier. (Sept. 15, 1970)

Knicks guard Walt Frazier. (Sept. 15, 1970) Credit: AP

Walt Frazier is 68 now, a half-century removed from a childhood in segregated Atlanta and from most of the people who shaped him there.

But the years fall away quickly in an episode of MSG’s “Beginnings’’ that premieres Tuesday and follows Clyde to his old neighborhood, and a time before anyone called him “Clyde.’’

While there he visits the restaurant where he worked as a teenager – and two owners who oversaw him then. He said in an interview Thursday that he found Zesto’s famous malteds as good as he remembered them.

Frazier recalled standing 5-9 or 5-10 when he started working there; then he started drinking malteds. “When I left there I was 6-3, 185,’’ he said.

The most memorable scene finds him serendipitously walking in on a community center meeting and encountering several men whom he played with and against in the early 1960s.

“Some of them are older than me, so they were my idols in high school,’’ he said. “Some said, ‘Remember me?’ A lot of them have gained a lot of weight and different things, but I remember.’’

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