Trivia: Cat says "you look like the attractive yet non-threatening, racially diverse cast of a CW show." This episode crosses over with The Flash, from the CW (this show was broadcast on CBS). From season 2 onwards Supergirl moved to the CW, to join the other Arrowverse shows.
Trivia: James and Winn find a meeting of Coville and his followers to be "a little cult-y." Melissa Benoist plays Rachel Koresh, the wife of cult leader David Koresh, in the miniseries Waco, a dramatization of the Waco siege - the 1993 standoff between the ATF and FBI and Koresh's Branch Davidians that lasted 51 days and resulted in 86 deaths.