Past Imperfect

S3, E7: On a routine assignment, Myka spots Leo, the man responsible for the death of her CIA partner, Sam, but loses sight of him in the busy train station. Myka is flooded by painful memories of her love affair with Sam, but must keep focus to track down the suspect with the help of her old team. When Leo escapes, yet again, Pete and Myka are convinced he has an artifact that allows him to freeze time in order to flee. The only clue is a blank card left behind by Sam for Myka, but can she solve his hidden message before she loses another partner? Pete is in the direct path of a frozen bullet, and it's up to Myka to stop the clock before the bullet resumes its speed. Meanwhile, back at the Warehouse, Artie has a new companion, with four legs.