In the 1965 Robert Butler-directed early episode of
Hogan's Heroes "Hold That Tiger" an agent played by Arlene Martel is in the barracks and when Hogan asks where a woman is supposed to sleep amongst a bunch of men Newkirk volunteers "she can share my cubical"
and then all the men start offering the same...including Kinchloe (Ivan Dixon) pointing to himself (12:50 at this link). In an interview Butler said he argued with Dixon on if this was appropriate for the show's audience, and they called the producer who told Dixon to go ahead and ogle her. It's not a big deal given it's two black guys amongst 9 whites, but it demonstrates that US network TV was steadily creeping up on interracial affairs.
How much that was curbed by the "webs" (networks) is difficult to say without seeing the broadcast standards memos for each show. ABC aired the Wagner-Nicholas kiss around the time
Laugh-In was shooting an episode in which they made a joke about not being allowed to show a black and white kiss on NBC...which may or may not have been true.