

[…]the aggressive push of current Political issues.
https://en.wikipedia.org/wiki/Kirk_and_Uhura’s_kiss
In the episode of Star Trek: The Original Series titled “Plato’s Stepchildren”, season 3 episode 10, first broadcast November 22, 1968, Uhura (played by Afro-American actress Nichelle Nichols) and Captain Kirk (played by white actor William Shatner) kiss. The episode is often cited—incorrectly—as the first interracial kiss on television. It was, however, the first instance in which a kiss between a black person and a white person on U.S. television was scripted, as an earlier kiss on Movin’ with Nancy was unscripted. The episode aired one year after the U.S. Supreme Court struck down nationwide laws prohibiting interracial marriage.
Star Trek has always been political.
Terrarium was pawbably the only genuinely great episode this season, and it still didn’t really do anything new as there have been several Enemy Mine episodes in past series (The Enemy - TNG, Dawn - ENT). This season also had pawbably the worst SNW episode to date in Four-and-a-Half Vulcans, which was just all kinds of problematic.