The young guy Noah killed was his father Bartosz. He killed him, presumably, to make the timeline work out. He killed him when he saw that Bartosz was getting ready to stop supporting Adam, just as Adam probably told him he would.
Do we know for a fact that this was Bartosz? I know a lot of viewers think it was, but I didn't think he resembled Bartosz at all, and the show was usually good at having actors who were believable as different ages of themselves.
The two women were Charlotte herself and Elisabeth, who stole Charlotte from Noah and slightly younger Elisabeth. Our Charlotte was *not* Doppler's granddaughter. Our Charlotte's grandfathers were Helge and Bartosz.
Your answers to the questions have been great, but you lost me here. First, which one does "Our Charlotte" refer to? Second, I thought the clockmaker / time machine maker was named Tannhaus, not Doppler. Helge's last name was Doppler. And can you remind me of how Charlotte's grandfathers were Helge and Bartosz? (I probably understood this while watching but have already forgotten.)
Again, I think you are mixing up Doppler and Tannhaus. Wasn't it Tannhaus who created the device in the origin world that created the two universes?