Lewis doesn't fit in either at work, as a border guard on the checkpoint between Troy and the human side, or with his family. He’s an outsider, never suave or cool. He’s vulnerable and a bit anxious. When he discovers he is half alien his world is thrown upside down. Like all humans there’s an element of casual racism in Lewis’ attitude to aliens and he’s often mean to Dominic, the alien cleaner who becomes his friend, he is fundamentally well-meaning and decent. He is funny without meaning to be and is very articulate.

Lewis is played by Michael Socha.