In DC's Legends of Tomorrow season 5, episode 4, "Slay Anything," the team travels to 2004 and 1989 to stop a resurrected serial killer named Freddy Myers, who was a high school prom slasher. While some sources may list this episode under a different name, the official S05E04 is indeed titled "Slay Anything".
You can find the full script and transcript of this episode at Forever Dreaming Transcripts or Springfield! Springfield! . DCs.Legends.of.Tomorrow.S05E04.HDTV.x264-SVA[ra...