quite a few inconsistencies in this
I mean, not to detract from the merits of the show, but I did notice some things that I hopefully can discuss with others:
1) Why didn't the adult Ulrich remember seeing Mikkel back when he was 16? I realize we don't remember everything from our teen years, but I would think a strangely dressed boy showing up at your house stating he lives there would have been a standout moment, not easy to forget.
Same question about Katharina, I suppose, but then to her the encounters would have been more random, so I can believe she wouldn't remember this at all.
2) Although, that brings me to Hannah - how did she not realize she'd seen that boy before when Ulrich's youngest son started growing up? Especially considering she was in a relationship with Mikkel the whole time?
3) Now, what about Egon? I watched the series twice in a row, and after the first viewing thought that it did seem like Egon remembered Ulrich from 1953, since he seemed prejudiced towards the teenage Ulrich in 1986. But upon the second viewing, I am not so sure... I mean, if Egon did remember him (AND connected the dots about time travel and stuff), there certainly wasn't any kind of giveaway.
But then, how would it have even been possible for him not to remember? Any cop would remember a child murderer (especially in a boring town like Winden) even if it is from 33 years ago. Especially when that child murderer talks of some song from the future and quotes a couple of lines from it in English, and tells Egon about his own future life.
4) Did no one notice after Helge's car accident in 1986 that the old man who crashed into his car had the exact same mangled left ear? (and scarring on left cheek)
5) Why would the 49y.o. Jonas write down "WHEN is Mikkel?" on his board? By then he had known for 33 years already what year Mikkel traveled to. He wasn't investigating anything, he already knew precisely what happened.
6) How did the dog open the door? Twice?? That's not to mention that the strong wind when one does so would have just carried it off.
7) This one is not terribly important, but still stuck out like a sore thumb (to me): how would they have known in 1953 that Yasin was Middle Eastern? He is light-skinned, and it wasn't something immediately apparent even when his eyes were intact. From a mutilated corpse that would have been impossible to infer.
The police also actually mentioned the brown color of the eyes, which was bizarre considering they were melted.
8) One more: Ulrich's mother Jana told him that she remembered a priest arguing with a man with a mangled ear 33 ears ago, and that the other day she saw that man again and he hadn't aged a day.
This is what I don't get: she'd lived in Winden her entire life, how would she not have known exactly who the man with the ear was??