Complex sentence: She passed Gerry on "Rua Dr Gentil Martins"--on his way back to the tapas restaurant from his 21:05 check--who stood chatting to Jeremy Wilkins, a television producer he had met at the resort.
Split into simpler sentences: She passed Gerry on "Rua Dr Gentil Martins"--on his way back to the tapas restaurant from his 21:05 check. He stood chatting to Jeremy Wilkins, a television producer he had met at the resort.