From the BBC: Read the article here:
"As kisses go, it is neither romantic nor explicit. There are some who argue - among them, on occasion, William Shatner - that the lips never touched. Watching it now, the scene seems chaste, almost to the point of self-parody.
And yet, the clinch between Lieutenant Uhura and Captain Kirk in the 1968 in the Star Trek episode Plato’s Stepchildren has become a historic moment in television, even though its claim to be the first interracial kiss on US network TV has been much disputed. (In fact, it may not even be the first interracial kiss by William Shatner on American television).
For Nichelle Nichols, who played Uhura, the kiss has taken on a life of its own, though the act itself was apparently unremarkable.
"It wasn’t a big deal", she says, “because it was scripted. Other shows had similar things, but because it was us doing it, it became a big thing.”
In the original script, Nichols recalls, the Vulcan Mr Spock was supposed to kiss Uhura. But, “Bill Shatner said, ’If anybody’s gonna kiss Nichelle, it’s gonna be me!’ Oh hell, yeah! But you just have to see my family to know that it was not a big deal. It was not a big deal for me.”