Kirk (in white space suit) goes to Spock's rescue, in Star Trek: The Motion Picture (1979).
Reference to Leslie Fiedler's 1948 essay “Come Back to the Raft Ag'in, Huck Honey!" about American's “national myth of masculine love,” as illustrated by the homoerotic subtext of Huckleberry Finn.
I'm not the first to make the connection to Fiedler's essay-- Time referenced it when they listed Captain Kirk and Mr. Spock in the couples section of their book, 100 Most Influential People Who Never Existed (2013).
K/S are even an interracial pair, like Huck and Jim––or, rather, since Spock is half-Vulcan, interspecific (the term for "occurring between species").