Doris Billingsly is a former resident of 31 Spooner Street, who was mysteriously killed in 1962.
When Peter and the guys look up home values in "Hefty Shades of Gray", Peter discovers that his house was a murder house. The guys decide to go ghost hunting, but abandon Peter in the dark basement when his screwing around annoys them. Later, Doris' spirit possesses Stewie and insists solving her mysterious death.
In "Coma Guy", she appears in Peter's hallucination of previously deceased characters.