By: AHSAN MUMTAZ
– Waterston says he is "grateful" for his time on the show and is "looking forward to what's next."
– He has won an Emmy Award and a Golden Globe Award for his work on Law & Order.
– Waterston is the longest-running actor in the franchise's history.
– He has appeared in more than 500 episodes of the show.
– Law & Order is one of the longest-running dramas in television history.