Original executive producers John Wells and Michael Crichton reprised their roles. Lydia Woodward joined them as a third executive producer having previously served as a co-executive producer since the first season. Mimi Leder did not return as a co-executive producer having moved into directing feature films. Carol Flint returned as a co-executive producer. Christopher Chulack returned to his role as director and producer and was promoted mid-season to fill Leder's position as director and co-executive producer. Paul Manning returned to his supervising producer post. Long-term crew member Wendy Spence Rosato returned as a co-producer. Neal Baer and Lance Gentile were promoted from their second season positions as executive story editors to co-producers for the third season. Gentile continued to act as the series medical consultant. Penny Adams joined the series as a co-producer mid-season. Finally Michael Hissrich joined the production team in the junior role of associate producer.