Who disappeared the night the youngsters went to the forest?
What time was the letter supposed to be opened?
What year was Mikkel sent to?
All the people and animals that died had one thing in common, what was it?
Who was Ulrich's brother?
What is the time traveler's name?
What did the time traveler give to Elli? Clue: it used to belong to her mother.
How does the series begin?