Rhona Mitra Joins Supergirl Season 4 as Mercy Graves

Deadline is reporting that actress Rhona Mitra and actor Robert Baker have been cast to play Mercy Graves and Otis Graves respectively in the upcoming fourth season of The CW’s Arrowverse DC Comics series, Supergirl. 

Mercedes “Mercy” Graves III debuted in 1996 on Superman: The Animated Series as the personal assistant and bodyguard of Superman‘s archenemy, Lex Luthor. Like Harley Quinn, Chloe Sullivan, and Livewire, Mercy Graves has since crossed over into comic books and is part of the DC Universe.

Her demeanor reveals a sardonic wit and her habitual dress is a chauffeur’s uniform with a very short skirt, a chauffeur’s cap, nylons, and short, high heeled boots. Mercy is loyal and respectful to Luthor, and she claims to be “the only one in Luthor’s entire company who can get away with calling him Lex”.

The character of Otis Graves is described to be the brother of Mercy Graves and her right-hand man. Otis is described to have a bit of a screw loose, but has savant-like abilities in assassinating aliens. The character is based on the character of the same name from Richard Donner’s classic Superman: The Movie, where he was portrayed by Ned Beatty.