Main Characters Dr. Matthew Nolan 6 main appearances DC Hana Li 6 main appearances Madeline Delaney 6 main appearances Jess Li 6 main appearances Mike Maxwell 6 main appearances Captain Chén 6 main appearances Co-Pilot Wú 6 main appearances Ruth Banks 5 main appearances Toni Zhāng 6 main appearances Dr. Kate Ward 5 main appearances John Tennant 5 main appearances Eric Jones 4 main appearances Supt. Simon O'Brian 2 main appearances Dr. Steven Hurst 3 main appearances Dr. Amber Hurst 3 main appearances Dr. Chris Peele 3 main appearances Shěn Zhào 3 main appearances Sir George Chapman 2 main appearances Cohen 1 main appearances Officer Miller 1 main appearances