TVLine premier reported the Waterston news.

Waterston played hard-nosed assistant district lawyer Jack McCoy on "Law & Order" from 1994 until its cancellation last annual O’Neal Jerseys, securing three Emmy nominations in the process.

LOS ANGELES (Hollywood Reporter) "Law & Order" practiced Sam Waterston has joined the actors of Aaron Sorkin’s cable news pilot by HBO.

Waterston joins Olivia Munn, who will play Sloan, 1 of the "new breed" of sexy fiscal analysts with a show above Will’s network; and Alison Pill, who namely set as Maggie, 1 of Will’s patriotic companion producers who is in a precarious relationship with dissimilar staffer aboard the show.

The project, tentatively captioned "More as This Story Develops," revolves approximately Will (Jeff Daniels), the co-anchor of a wire news show who must compete with a fashionable crew afterward his fellow host lands a new gig and takes most of his staff with him. Waterston ambition activity Will’s foreman.