The Simian Line is a 2001 American improvisational film released in New York City and Los Angeles.

The ensemble cast includes Harry Connick Jr., Cindy Crawford, Tyne Daly, William Hurt, Monica Keena, Samantha Mathis, Lynn Redgrave, Jamey Sheridan and Eric Stoltz.

Arnita doesn't tell them that she can see a fourth couple at the party, the long dead Mae (Samantha Mathis) and Edward (William Hurt).

As days go by, Katharine grows increasingly jealous of her lover Rick (Harry Connick, Jr.), and his flirting with her neighbor Sandra (Cindy Crawford).

Marta (Monica Keena) and Billy (Dylan Bruno) are rock musicians who live in the same building as Katharine.