FX on Hulus Under the Banner of Heaven tackles the true story of the Brenda and Allen Lafferty murder case, with Andrew Garfield leading the Under the Banner of Heaven cast of fictional and real-life characters. Under the Banner of Heaven, based on the 2003 nonfiction book of the same name, continues Hulus trend of true-crime TV shows, with the 2022 series depicting a gruesome double-murder. As Under the Banner of Heaven uncovers the true story of the brutal murders, the series sees the characters question their beliefs while addressing religious delusions and the dangers of unyielding faith.

https://screenrant.com/under-banner-heaven-cast-real-character-comparison-guide/