Taraji P. Henson is a 'Person of Interest.' The Oscar-nominated actress will star opposite Michael Emerson on the CBS pilot.

According to Vulture, Henson will play Carter, a detective. The J.J. Abrams-produced pilot follows an ex-CIA agent who is hired by a billionaire to help fight crime in New York City. Emerson will play the eccentric billionaire.

Henson previously appeared on 'Eli Stone' and 'Boston Legal.'

In other casting news ...

• Gabrielle Union has joined the cast of 'Little in Common.' The Rob Thomas comedy follows three couples who are connected via Little League sports. Union will play a very competitive lobbyist. [Deadline]

• Jean Smart will star in NBC's untitled comedy about a family of doctors. Smart will play Dr. Barbara Foote, a meddlesome mom. [Deadline]

• Aidan Quinn will star in 'Prime Suspect.' Quinn will play Lt. Kenny Rowe. Maria Bello stars as Det. Jane Tennison. [TVLine]