Guest Stars Camilla Luddington as Dr. Jo Wilson Tessa Ferrer as Dr. Leah Murphy Justin Bruening as Matthew Taylor Kyle Silverstein as Ethan Dawson Michael Buie as Paul Dawson Charles Michael Davis as Dr. Jason Myers Enid Graham as Rachel Dawson Jennifer Bassey as Nancy Dawson Tom Costello as Seth Lepik Sarah Lilly as Joyce Basche Abbie Cobb as Francis "Frankie" Keller Idara Victor as Amelie Ward Steven M. Gagnon as Mr. Lepik Anthony Montgomery as Chris Ward Mike Hagerty as Al Keller Thom Barry as CDC Investigator Katy Kurtzman as Deedee Keller Anton Narinskiy as Gunnar Elisabeth Noone as Bess Lepik Andrew Manning as Tony Keller Robin DeMarco as Jane Keller Sam Fuller as Cash Keller