<Li> Paige Spara as Lea Dilallo: Shaun's love interest / former neighbor . (season 2; recurring, season 1) </Li> <Ul> <Li> Dylan Kingwell as Steve Murphy (season 1): Shaun's younger brother, in flashbacks . He also portrays Evan Gallico, a boy in the present that resembles Shaun's brother and is suffering from stage 4 osteosarcoma . </Li> <Li> Chris D'Elia as Kenny (season 1): Shaun's new neighbor, who moves into Lea's apartment . Shaun mentioned that he was arrested when Lea returned . </Li> <Li> Lisa Edelstein as Dr. Marina Blaize (season 2), an expert oncologist </Li> </Ul> <Li> Dylan Kingwell as Steve Murphy (season 1): Shaun's younger brother, in flashbacks . He also portrays Evan Gallico, a boy in the present that resembles Shaun's brother and is suffering from stage 4 osteosarcoma . </Li> <Li> Chris D'Elia as Kenny (season 1): Shaun's new neighbor, who moves into Lea's apartment . Shaun mentioned that he was arrested when Lea returned . </Li>

Who plays shawn's brother in the good doctor