The Resident 4x10 "Into the Unknown" Season 4 Episode 10 Promo Trailer HD - Just when Mina and The Raptor can see their future together, an unexpected complication throws a wrench in their plans. Meanwhile, Cain faces a harsh reality when Kit gives him the opportunity to prove he is ready to return to the OR. Then, Devon presents Rose (guest star Cara Ricketts) with a groundbreaking clinical trial that could help her battle with Sickle Cell Anemia in the all-new “Into the Unknown” episode of THE RESIDENT airing Tuesday, April 20th on FOX.