1) CBC Radio One program 2) Crepuscle 3) Crepuscule 4) DC Comics supervillain 5) Dusk 6) Evenfall 7) Fall 8) First-person adventure game 9) Gloaming 10) Hour 11) The coming of night 12) The end of daylight 13) Time just after sunset 14) Time of day 15) Twilight Found on https://www.crosswordclues.com/clue/nightfall