9-1-1
Karl guest-stars as Athena’s (Angela Bassett) training officer, Brogan McCluskey in eps 3.7 “Athena Begins”.
When a murder weapon from a case close to Athena in the early ‘90s resurfaces, flashbacks to 1989 show how young Athena (Pepi Sonuga) joined the LAPD and became the officer she is today.