Star Trek: Every Two-Parter Ranked From WORST To BEST

42. Terra Firma, Part 1, Terra Firma, Part 2

First on the list, Star Trek: Discovery's third season two-parter is on shakier ground than its title. Terra Firma, Parts 1 & 2 weren't outright bad by any means, but there are 41 double episodes that are better. Life, the Mirror Universe, and Everything, and one in the form of Carl, Guardian of Forever, or it was curtains for Philippa Georgiou.

At the time, Terra Firma was meant as the backdoor (and the big gate) to the ex-Emperor's own spin-off TV show. That was a rocky road to what was Star Trek's first-to-streaming movie. The two-parter's most egregious error was, then, no doubt, that it became 'three-' in what was made of Star Trek: Section 31.