Rhona Mitra joins Supergirl

British actress Rhona Mitra will play the role of DC villainess Mercy Graves in the upcoming fourth season of Supergirl. Mercy Graves is known from the comics as super-villain Lex Luthor’s long-time bodyguard. However, in the upcoming season, we will get to see Mercy step out of Lex’s shadow and do things on her own. 

Rhona will be joining other Supergirl newcomers, such as Sam Witwer as Agent Liberty, David Ajala as Manchester Black, and Robert Baker as Mercy’s brother. Rhona Mitra is seen in the series, The Last Ship.