Rhona Mitra (The Last Ship) is set to join the cast of Supergirl in a recurring role.
Mitra will play Mercy Graves traditionally the bodyguard of Lex Luthor ever since her introduction to the Superman mythos in Superman: The Animated Series. In Supergirl Mercy Graves is an ex-Cadmus agent stepping out from behind the shadow cast by the Luthors. With her biting wit and lethal brawn, Mercy steadily becomes a key figure in National City’s growing “human-first” movement.
Mercy Graves is joined by her brother Otis Graves set to be played by Robert Baker (The Originals).
Otis Graves is Mercy’s defacto right hand man. What he lacks in brains, he makes up for with his savant-like abilities to assassinate aliens. Otis is a character from the Superman movies with Christopher Reeve and has not been featured in comic books.