Jillian accompanies Zoe to the retreat and then hands over plans for the railgun to Bass Shepherd in episode 2x10 "Prisoners". When Alonzo approaches the compound looking for Zoe, one of the C.O.P.E. members shoots him and the rest pull guns and dig in for a standoff with the police in episode 2x11 "Celebration Day".
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". Appears in 2 more episodes.