In the question given below, one word has been omitted. Choose the most appropriate word from the given options that can fill the blank and make the sentence contextually and grammatically correct.
The season finale of the popular TV series was rated __________ by the viewers as the writer and the director did a fantastic job on their part.

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.