Although Tabitha Saint Germain voices Martha in the show, Kathy Najimy voices Martha in the audiobooks.
T.D.'s full name is "Tyrone Daniel Kennelly".
Martha is a mutt, meaning she is a mixed breed of many dog breeds. She has mentioned "Labrador Retriever" and "Pitbull" in the show.
In the books, Helen's last name is "Finney". But in the show, her last name is "Lorraine".
The name of the town the show takes place in is "Wagstaff City". This is a parody of the real-life town "Flagstaff" in Arizona, U.S.A.