Villanelle exits the metro and crosses the street in episode 1x01 "Nice Face".
Eve & Bill discuss the outcome of their meeting and their plan for the night before Bill catches a glimpse of Villanelle as she brushes past him in episode 1x03 "Don't I Know You?".
Villanelle walks across a bridge over some train tracks after escaping the hospital in episode 2x01 "Do You Know How to Dispose of a Body?".