In a surprising moment, Dr. Whitaker (Gerran Howell) clues in a returning patient about Dr. Collins, played by Tracy Ifeachor, who announced her departure from the HBO Max series in July 2025. "She's the one that got away in some ways," Wyle told PEOPLE ahead of the season 2 premiere of Dr. Collins and Dr. Robby's relationship. Here’s a breakdown of everything that took place, from an explanation for Dr. Collins’ departure to Dr. Whitaker’s surprising friendship. John Johnson/HBOSome information on Dr. Collins’ whereabouts is revealed during episode 4 after Louie asks Dr. Whitaker where she is. With Dr. Robby listening in at the door, Dr. Whitaker explains that “Dr.