Off to London - NCIS

Ducky and Bishop head off to London when a case connects back Ducky's past on NCIS. "So It Goes" is the third episode of the show's 12th season.
Added:

NCIS Season 12 Episode 3 Quotes

Margaret: I thought you hated bow ties.
Ducky: I do. They're impossible to keep straight.
Margaret: Why are you stlll---

Margaret: Why didn't you ever marry? You had so much love to give.
Ducky: A colleague and a very good friend of mine lost his soul mate. And then he nearly wrecked his life marrying the wrong woman over and over, trying to find her again. I chose to skip that part.