Spilett notes at the begininng of the episode that the date is March 15, 1866.
Herbert mentions in this episode that it has been less than three months since his father passed away.
Goof: When Herbert is lowered down the cliff by Peter, the viewer can glimpse a modern day harness attached to his waist and not just the rope Peter is holding.
Cutler destroys the Lady Joanna with a keg of gunpowder that he brought ashore with him.
The castaways find a knife with a large N embossed on the handle. This is the second item they have found with such an engraving.
By his actions in this episode, Ayrton seems to be a staunch vegetarian who kills animals only in self defense.
By the longitude/latitude of Ayrton's camp location, the castaways determine that New Zealand ( the nearest land mass) is 1,800 miles away.
It is mentioned that Ayrton has been on the island for six years.
The location of Ayrton's camp is 153 degrees West longitude, 37 degrees, 11 minutes South latitude on the island.
During the voyage to Ayrton's location, Jack, Herbert and Gideon discover that the compass they brought is usless due to the presence of a powerful unseen magnet.
Jack names the boat that he has built the ' Lady Joanna '.
It is mentioned during the episode that Captain Harding's family had a large plantation in Virginia with a number of slaves. When Harding inherited the plantation, he freed the slaves on it which included Neb and his parents.
At the beginning of the episode, the date of reference is given as March 20, 1865.