“I personally enjoyed it a lot... it’s like stoner thoughts made into a TV show that actually use physics and math to theorize what could exist out there.” Reddit · r/scifi · 5 years ago
You enjoy speculative biology, have an interest in the "how" and "why" of evolution, or want a visually impressive, relaxing show to watch. Alien Worlds
Praise for the series often focuses on its ability to spark wonder, while negative reviews highlight unmet expectations for a pure "alien" experience. “I personally enjoyed it a lot
The show is noted as an excellent "entry-point" for beginners or younger audiences interested in astrobiology and evolutionary biology. More scientifically literate viewers often found the explanations "basic" or "patronizing". The show is noted as an excellent "entry-point"
“Its exoplanet segments are a mixed bag; they look great but are a really jarring contrast to the real-life segments.” Decider · Joel Keller
“A good series with interesting ideas that still doesn’t reach the heights it should. I like it—but once again, I wanted more.” IMDb Quick Verdict
The most common criticism is that the show spends roughly 60% to 70% of its runtime on Earth . While these segments explain the scientific principles behind the alien designs (like extremophiles or gravity), many viewers found them to be "filler" that distracted from the promised alien content.