(the lead singer) dumped him during a fire, and Lu gave him a job in her new free clinic. Often shown as a ladies man with several girlfriends (ironically, his mother is convinced he's gay due to his vocation), he finally has settled into a relationship with Kayla, to whom he proposes in the series finale. Philip Casnoff as Dr. Robert "Bob" Jackson (seasons 1–5). Chief of staff of Rittenhouse Hospital, he is the stoic, administrative figure and also ultimately in charge of decisions regarding funding, especially to the women's clinic. Jackson had once been a top surgeon but when a young girl died during surgery due to a mislabeled drug dosage, Jackson lost his nerve for the operating room and moved to administration. Jackson considers himself a personal friend of Dr. Campbell (as he was with Dr. Stowe), but generally is more impersonal and sometimes butts heads with Dr. Delgado over financial or liability issues, and with Lana over administrative issues. He was married with two daughters, Lauren and Paige. A recurring subplot throughout the series was Jackson dealing with his wife Susan's advancing MS condition. He even briefly left her, but eventually returned to her. Jackson's character was laid off by hospital owner Octavian prior to the start of the final season. Brennan Elliott as Dr. Nicholas "Nick" Biancavilla (seasons 1–4; guest season 6), an ER doctor at Rittenhouse who had a brief relationship with Dr. Stowe. He has four older sisters—one of whom is Francine Biancavilla, a lesbian whose life-partner he married in order to get her the critical medical care she desperately needed. Dr. Jackson found out, but Nick gave Francine a medical insurance plan as a wedding gift that covered existing illnesses. Nick left at the end of the fourth season when he transferred to Manhattan General, but returned for a guest appearance in the final season. Tamera Mowry as Dr. Kayla Thornton (seasons 5–6). A new doctor and young medical prodigy, Thornton is a fast study at Rittenhouse, entering residency in the beginning of the fifth season and becoming a depended-upon ER regular by the end of that season, despite occasional disbelief by patients that she is a qualified doctor. As she becomes a main character to the show, her personality can be compared to that of a young Dr. Delgado with her ambition and hard work. She decided to become a doctor as