Note: This story contains spoilers from “The Pitt” Season 2, Episode 4. While most of “The Pitt” crew returned for the medical drama’s second season, fans were surprised to learn that Tracy Ifeachor’s Dr. Collins wouldn’t be clocking in for the Fourth of July shift. Collins finished her residency [and] took up a job in Portland as an attending physician,” Whitaker explained. “[I] think that’s where she’s from … she’s adopting a baby [and] wanted to be closer to her family.”Noah Wyle’s Dr. Robby, who had a romantic history with Dr. Collins, popped into the room while Whitaker talked to Louie, closing the door with a softened, reflective look. The mention of adoption comes full circle with Season 1, when Dr. Collins endured an excruciating day in the ER after suffering a miscarriage during her shift.