Guest Stars Nicholas Campbell as Grandpa Gordon Cooper Oluniké Adeliyi as Noor Ermias Nicola Correia-Damude as Kelly Hart Alex Mallari Jr as Mal Co Starring Graeme Jokic as Matteo Brenna Coates as Lucy Lovell Jeffrey R. Smith as Dr. Casey Winter Keller Viaene as Young Katie Obssa Ahmed as Yusef Moses Nyarko as Rehab Orderly Joseph Motiki as Medic David Ferry as Emery Groves Karine Ricard as Dr. Green Claire Riley as Dana Groves