TV Helluva Boss Helluva Boss 8.038/10 by 26 users In Hell, imp Blitzø (the 'o' is silent) runs an assassin business targeting the world of the living, using a spell book borrowed from a prince of the underworld. With employees Moxxie, Millie, and Loona, they attempt to survive each other while keeping business afloat. Details Casts Posters Images Title Helluva Boss Alternative Titles First Air Date 2020-10-31 Last Air Date 2024-12-21 Number of Episodes 20 Number of Seasons 2 Genres Animation, Comedy, Drama, Sci-Fi & Fantasy, Networks YouTube, Casts Brandon Rogers, Richard Steven Horvitz, Vivian Nixon, Erica Lindbeck, Bryce Pinkham Plot Keywords , Blitzø (voice) Brandon Rogers Moxxie (voice) Richard Steven Horvitz Millie (voice) Vivian Nixon Loona (voice) Erica Lindbeck Stolas (voice) Bryce Pinkham