Rhona Mitra Cast in Villain Role for Supergirl Season 4

According to Deadline, Rhona Mitra has been set for a recurring role on the CW’s series Supergirl as Mercy Graves, Lex Luthor’s longtime bodyguard. Also cast in a recurring role is Robert Baker, who will play Mercy’s brother, Otis Graves. Mercy Graves (Mitra) is an ex-CADMUS agent who has always believed in “human exceptionalism”. But with both Lex and Lillian in prison, Mercy is stepping out of the Luthor shadow and running her own show. Marcy Graves first appeared in Superman: The Animated Series.