Alex Price is the actor who portrays the character Proteus on Penny Dreadful. Alex Price is a British actor who has appeared in various television programmes including Being Human, Merlin and Doctor Who. He has also starred in feature-length films such as Horse With No Name and in a variety of short films. Since 2013, he plays the main character Sid Carter in the television series Father Brown. Alex Price was praised by critics for his performance of Proteus in the television series Penny Dreadful. He has also appeared in a vast number of stage productions including Is Everyone OK? (Nabokov Touring Project), Colourings (Old Red Lion), The Duchess of Malfi (National Theatre Studio), Birdland (Royal Court Theatre).