THE CALL: Christopher found out about the lies, he read all the letters and found about his mom being alive.
THE THRESHOLD: this is when the woman shows chris where the train station is and he goes there, but it's too crowded and he doesn't like being in a place with a lot of people.
THE CHALLENGES: this is when Chris needs to use the bathroom, but he didn't know there was a bathroom in the train so he peed himself.
THE ABYSS: the greatest challenge of the journey was when he went underground by himself to take the subway. That was the biggest challenge because he faced the crowd, noise, the unknown and near the death of Toby, and also seeing his mom after 4 years thinking she was dead
THE TRANSFORMATION: this is when Chris went on the subway, gets in London, gets to his mother's house and he is now a braver person