Rhona Mitra (“The Last Ship”) has been set in a recurring role as Mercy Graves, Lex Luthor’s longtime bodyguard, on The CW’s “Supergirl”. In addition, Robert Baker (“Santa Clarita Diet) has scored a recurring role as Mercy’s brother Otis Graves.
In the series, Mercy is an ex-CADMUS agent who has always believed in human exceptionalism. With Lex and Lillian in prison, she steps out of the Luthor shadow and runs her own show and becomes a key figure in National City’s growing ‘human-first’ movement. The character first appeared in “Superman: The Animated Series” in the 1990s where it was voiced by Lisa Edelstein.
Baker’s Otis Graves is Mercy’s defacto right-hand man who isn’t too bright but makes up for it with savant-like abilities to assassinate aliens.