I wasn't planning on watching the episode last night. I was just going to go to bed after the Super Bowl (I was rooting for Atlanta but what an amazing game that was) but I couldn't wait and decided to watch it anyway.
I was very torn about Samuel. Of course, we all can say he did the right thing and gave Caleb his train ticket so he could be reunited with his family. But I can understand he was so tempted not to do so. Anyway, the good news for him is that he gets consolation prizes- teaching medicine to Dr. Byron Hale and a relationship with Charlotte Jenkins.
So interesting that Mutt Murphy, the White man diseased with smallpox raises every objection about being confined with people who share nothing in common with him but the same dreaded illness. Then, he is saved by Samuel Diggs. Dr. Hale sees this and, in a "Nicodemus meets with Jesus" type moment, he asks Diggs to teach him what he should already know.