In the question given below, one word has been omitted.

Solution

The sentence suggests that the season finale was highly praised because the writer and director did a fantastic job. "Impeccable" means flawless or perfect, making it the most appropriate choice. "Jiffy" means a short moment, which does not fit the context. "Ludicrous" means ridiculous or absurd, which is opposite to the intended meaning. "Inevitable" means unavoidable, which does not describe the rating of a show. "Mediocre" means average or unimpressive, which contradicts the phrase "fantastic job" in the sentence.Thus, "impeccable" is the correct answer.