[s1e17] Cliff Anger -

: The title plays on the character's name and the potential for conflict—likely "Prince Cliff's Anger"—as diplomatic relations between the fairies and Spartans are strained.

: As an episode leading toward the season finale, it successfully ramps up the stakes by involving rival kingdoms, making Astral's desire to stay on Earth even more complicated. [S1E17] Cliff Anger

To give you the most accurate review, could you confirm if is the show you meant, or if you were referring to a different series? The Other Kingdom (TV Series 2016) - Episode list - IMDb : The title plays on the character's name

: A literal "cliff" episode where the character Sancar ends up at the edge of a cliff , physically and emotionally. The Other Kingdom (TV Series 2016) - Episode

If you were actually looking for a review of a different show's 17th episode with a major "cliffhanger," here are two common matches: