Syd and her team help David escape where he is being held and they escort him down to the beach where he meets Melanie Bird in episode 1x01 "Chapter 1".
Young David and Amy play with their dog on the beach in episode 1x03 "Chapter 3". Amy and David play in a flashback while Amy tells Dr. Poole that they never had a dog as a child in episode 1x04 "Chapter 4".
David leaves the mental hospital in Syd's body and sees three strange individuals getting out of a car in episode 1x01 "Chapter 1". Lenny has therapy sessions with all the team members in her office in a dream version of the hospital and David is denied pie in the cafeteria in episode 1x06 "Chapter 6". Lenny waits in the office for David to weaken so she can take over in episode 1x07 "Chapter 7".
The group rushes downstairs past more dead bodies in episode 1x05 "Chapter 5".
Lenny explains how she stole the stove while walking down an alley in episode 1x02 "Chapter 2". Lenny rolls David down the alley in a shopping cart while Syd, Melanie, and Ptonomy walk past. Melanie introduces Syd to child-David and Syd gives him a hug in episode 1x03 "Chapter 3".
David is taken to a facility in the woods where Dr. Bird and the others attempt to help him control his powers and examine his memories in episode 1x02 "Chapter 2". David sits by on the dock while Melanie listens to the coffee machine. Later Syd and David land in the water after teleporting out of the building during a stressful session in episode 1x03 "Chapter 3". The injured Kerry is brought back to the compound and later David demonstrates his new abilities for Syd in episode 1x05 "Chapter 5". The whole gang returns from David's childhood home with Amy and soon discover a freshly thawed Oliver in episode 1x07 "Chapter 7". David neutralizes the Division Three forces and then invites Clark inside in episode 1x08 "Chapter 8".
David's rational mind helps him create a classroom in his mind where he can calmly work through the problem of the parasite in episode 1x07 "Chapter 7".
Melanie walks through the hallway heading towards where Oliver is frozen in episode 1x07 "Chapter 7".
Oliver under the control of the parasite drives away with Lenny in the passenger seat in episode 1x08 "Chapter 8".