Fiona Apple is such a great artist, while being quite an enigma from my vantage point. If you were watching Showtime's The Affair series finale, you may have caught her cover of the Waterboys 1985 song, Whole Of The Moon. It's a great song to begin with and Fiona definitely nailed it. Hoping she properly releases it, as last check it only existed in YouTube videos, which you can check out below (along with The Waterboys original version).
Also, this was not Fiona's only contribution to The Affair, as her original song, 'Container' has also served as the series' theme song since the premiere in 2014.