Roger Smith is a fictional character in the adult animated sitcom American Dad!, voiced by Seth MacFarlane. The character was created and designed by Seth MacFarlane. Roger is a centuries-old grey space alien living with the Smith family, around whom the show revolves. Having lived on Earth since 1947, Roger came to live with the Smiths after rescuing main character Stan Smith at Area 51 four years prior to the beginning of the series. Roger began the series as a sensitive pushover who is often taken advantage of, cheated, and ridiculed. Over time, the character has become increasingly cruel, callous, self-interested, devious, crafty and depraved. In early episodes of the show, Roger is disallowed from leaving the Smith house in order to conceal his being an alien. This restriction is soon abandoned and Roger begins adopting disguises and fictitious personas in order to have a life outside the house. Roger's personas have become a major plot device, with his myriad alter egos frequently being the subject or facilitator of an episode's main story or subplot. This also helps to amplify his androgynous nature, which varies dependent on the plot situation and persona he has adopted.