Guest Stars Debbie Allen as Dr. Catherine Avery Tina Majorino as Dr. Heather Brooks Justin Bruening as Matthew Taylor Veronica Cartwright as Lydia Ashford Heather Hemmens as Sasha Bobby Campo as Brian Josh Clark as Lenny Shulte Co Starring Payton Silver as Dr. A. Knox Elle Tanz as Bailey Shepherd Grace Rowe as Paramedic Grace Kate Mines as Nurse Gloria Mara Hall as Nurse Kathleen James McAndrew as Nate Brent Henry as Paramedic #2 Jennifer Lauren DiBella as Nurse Andrea Noel Arthur as Deputy Fire Chief Caryn West as Maura Brooks Alexander Wraith as Oscar Hallis Aaron Scotti as Firefighter Milda Dacys as Marla Shulte Bobby Neely as Tilden