The series focuses on the Smith family, which housemates are: Stan Smith, the father and CIA agent; Francine Smith, his wife; their college-aged daughter, Hayley Smith; and their high-school-aged son, Steve Smith. Outside of the Smith family, there are three additional main characters, including Hayley’s boyfriend turned husband, Jeff Fischer; the family’s man-in-a-fish-body pet,Klaus; and most notably the family’s zany alien, Roger, who’s “full of masquerades, brazenness, and shocking antics.”

In the episode ‚ÄúThe Wrestler‚ÄĚ, Barry (guest voice Thomas) threatens Stan’s old high school wrestling record. So, Stan enlists Roger to beat Barry and defend his small claim to fame. However, Stan is caught off-guard when Roger, not Barry, is actually the threat to Stan’s record. Armie Hammer gives voice to one of the secondary character of the episode.