1. When John thought he lost his family (Andrea and Kati), he felt like his heart was stolen from him (just like his doppelgänger). As he was walking dejectedly, he was again saw his doppelgänger who pointed his fingers towards two figures, which eventually turned out to be Andrea and Kati. Filled with joy and relief, he ran to them with full concern. (Event was interesting as John Taylor's doppelgänger Janos Szabo saved Andrea and Kati's lives, which was totally unexpected). 

I'll leave the rest for you to figure out, study well and good luck with PT3!