“Journey into the Past, Part 1: Baron of the 'Sterz”
Mindor gets a small river cruiser back into operation, and the little group sails up the Hudson to explore. At the Cloisters they encounter Baron Richard, who rules a tribe living as though they were in Medieval times. Mindor is laid low by an infected wound, but Richard says that he can be cured with the horn of a unicorn.
“Journey into the Past, Part 2: Beauty and the Beast”
Richard imprisons Samson, ordering Sharmaine to capture the unicorn, which is actually a mutation. Samson saves her and fights the radioactive beast. That radiation does indeed heal Mindor, and strengthens Samson, but it kills Richard when he tries to seize it. Some of the tribesfolk leave the Cloisters, while others decide to make their home there and create a new regime, while caring for the irreplaceable artworks.