Disclaimer: I do not own Leverage nor am I associated with Dean Devlin, Timothy Hutton or Gina Bellman. No copyright infringement is intended.
Scent
They say the strongest memory trigger is scent and Nate can vouch. He had never been able to exactly place Sophie's perfume but whatever it was that clung to her skin took him right back to Damascus, Paris, Tuscany. That spicy, floral scent he could smell whenever she had been in a room, just a few steps ahead of him. That fragrance that filled his thoughts and dreams when he slept next to Maggie and still does now that he sleeps next to an unoccupied pillow.
And then, one night, it isn't unoccupied, and for weeks he can smell her perfume on it.