Marcy is working at the library late at night when she is attacked by a group of men and overwritten before she can be killed in episode 1x01 “Travelers”.
Philip is working on the computer setting up the chat room when Detective Gower arrives to question him about his roommate's death in episode 1x01 “Travelers”.
Maggie shows Winn footage of his night at the art gallery but Lyra doesn't show up anywhere on the footage in episode 2x16 “Star-Crossed”.
Kelly talks to James in the car while dropping him off at his first therapy session and then gets a call from Alex in episode 4x18 “Crime and Punishment”.
J'onn poses as Kelly in order to draw Malefic into an ambush but he somehow escapes them in episode 5x04 “In Plain Sight”.
Kellog gives Alec access to his lab so Alec can modify the time travel device in episode 4x05 “The Desperate Hours”.