Detective Michael Britten (Jason Isaacs) continues to deal with his parallel versions of reality. In one world he s looking for ways to reconnect with his son, Rex (Dylan Minnette), by offering him some normalcy while they deal with his mother s death. In the other, Britten works to understand the emotions that his grieving wife, Hannah (Laura Allen) is going through. Meanwhile, a witness in the murder of a homeless man tells Britten and his rookie partner, Vega (Wilmer Valderamma) that a small guy was spotted at the scene of the crime. When that clue crosses over into the case Britten is working on in his other reality, Bird (Steve Harris), is confused by his partner s sudden interest in the height of the suspects they are investigating. Meanwhile, Britten s captain, (guest star Laura Innes) shows growing concern over his behavior. Later, the events surrounding the fateful accident that changed Britten s life come into question and throughout, Dr. Lee (BD Wong) and Dr. Evans (Cherry Jones) continue to present their dueling theories on Britton s condition.