Roger (American Dad!)

Also according to "Frannie 911", Roger has been on earth for over 60 years, having arrived in 1947 as a result of being tricked,[8] led to believe he was "The Decider" in whose hands the fate of mankind rested, when in fact he was serving the role of a crash test dummy. Earlier, after causing his aunt's spaceship to crash, Roger lived with a family of pioneer fur trappers that died travelling on the Oregon Trail in the episode "OreTron Trail". There is also the possibility, he or another member of his race came to earth in early antiquity, as in the first episode of the 13th season a stone carving is shown depicting an alien looking like Roger squatting above a pyramid with two Egyptians presumably praising him and hieroglyph characters surrounding them. In the episode "Naked to the Limit, One More Time" however, it is evidenced that Roger remains on Earth by will, the episode revealing that he can simply call for his people's spaceship to return him to his birth planet if he so desires.

Details on Roger's actual family and pre-Earth life have yet to be shown on the series. Although in the episode "Lost in Space", a brief clip revealed that prior to Roger's life on Earth, he was involved in a homosexual romantic relationship with another member of his alien race, Zing; however, Roger cheated on Zing, blatantly making out with a human male in front of him. It's also been revealed in the episode "I Am the Walrus" that Roger ate his father when he turned 15. Roger revealed in the episode "OreTron Trail", that he once visited Earth before in the 1800s after crash landing with his aunt Caroline and she died on impact.

Roger came into contact with the Smith family when he saved Stan's life back when Roger was a fugitive of Area 51 (four years prior to the show's beginnings). Feeling he owed Roger a life debt because of this, Stan rescued him from government capture and allowed him to live in his home. Stan has allowed this in defiance of his employer, the CIA. Roger now covertly lives in the Smith home. Roger uses the Smith's attic as his hideout/room/bar.

After Stan took Roger in for saving his life, he felt that it would endanger him and the rest of his family if it were to be discovered that Roger is an alien and living with them. Consequently, Stan forbade him from leaving the house when the series first began, even in disguise. Confined to the house in the first couple of seasons, Roger was miserable and malcontent.[4] However, Roger is able to skillfully use disguises to exist in the outside world, which has become a major plot device in later episodes. Adding to this, he's created countless alter egos to go along with them.[7]

Roger has, however, abused this practice, leading numerous lives and outrageously deceiving numerous people. In fact, some of Roger's characters are in prison, while others are widely despised, and others somehow have full-fledged human families and are even married; several of his characters somehow have birth children while others are graduates of Howard University. Roger also uses several of these personas to act in a criminal manner, as several of his alter egos have been seen to engage in robbery, sexual assault, police corruption, identity theft, drug trafficking, child abuse and with one persona even admitting to being wanted "for a series of prostitute murders".

As the series has progressed, Roger's personas have developed their own lives that even he can be unaware of and his control has been shown to be tenuous at best. In "The Horse Whisperer" he realizes seconds before walking into a room (to see a horse therapist) that he is the one inside; In another episode both he and Stan express surprise that a character introduced by Roger wasn't one of his personas.

Despite his numerous disguises consisting of only a different set of garment and hair with no effort to disguise his gray skin, non-human face and body features (with some exceptions, like additional body weight, facial hair or wrinkles), Roger has been capable of deceiving virtually every single person he interacts with without ever being discovered as an alien; not even by Stan's colleagues from CIA, who according to him, have "an entire floor" looking for Roger. The Smith family is the only exception; however, for each member of the family there is one individual alter ego they can not recognize as Roger. On top of that, Roger has been sent to the hospital several times over the course of the series, and medical personnel, for some reason, have never found out that he's not a human.[9]