Stringfield claims she was asked to reprise the role of Susan Lewis in "ER" several times, but turned each offer down. However, following the birth of her daughter, she approached the producers of "ER" and then rejoined the cast in 2001, the show's eighth season. "I changed my mind," Stringfield commented, "I really want to work now. It just made sense for me to go back to "ER"." 26.7 million people watched Stringfield's return, placing the show at first place in the ratings. During her second stint in "ER", Stringfield's character was featured in a special 'crossover' with NBC's New York City based police drama, "Third Watch", which aired in 2002. She remained in the role for four additional seasons, however in August 2005, Stringfield announced that she would be leaving the show again as the 12th season came underway. "I am extremely grateful for the time I spent on "ER"," Stringfield explained. "It is a wonderful show, and there are so many people I will miss. But I'm ready for new roles and new challenges." In 2009, Stringfield returned to "ER" for the series finale "And in the End...".