Metallica’s “Hardwired… To Self Destruct” track was heard in the closing seconds of the half-season finale of the Showtime series Billions. The main character of the show Bobby Axelrod (Damien Lewis) is a rock and metal fan and heavy music often shows up in the series. Metallica actually appeared and performed on the show in Season 3. Also heard this season are songs by Rainbow, Greta Van Fleet, and Bobaflex.