Laura Archbold: Rosa, Sophia.

Who is Maddie's mom on imposters?

Mary Kay Place as Marsha Bloom, Ezra's innocent and good-natured mother.

Who is the imposter?

An imposter is a person who pretends to be someone else. ... An imposter usually seeks some kind of financial gain when he or she assumes another person's identity, but there can be other motivations, like simply the thrill of doing it.