Guest Stars Debbie Allen as Dr. Catherine Avery Tina Majorino as Dr. Heather Brooks Justin Bruening as Matthew Taylor Heather Hemmens as Sasha Bobby Campo as Brian Veronica Cartwright as Lydia Ashford 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 Jennifer Lauren DiBella as Nurse Andrea Brent Henry as Paramedic #2 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