When filming the scene where Xena makes her entrance and sees Gabrielle in Aiden's arms, director Rob Tapert tried to help his wife Lucy Lawless find her motivation and told her "She's in another man's arms!" This had the opposite of the desired effect: Lucy promptly collapsed into laughter, since she had never quite considered Xena the "man" in Gabrielle's life.
The greensman who was hired to lay out the garden was a certified Tai Chi instructor. He took it upon himself to instruct Lucy Lawless in proper Tai Chi.
Shortly after Xena and Gabrielle fall into the deep hole and awaken in a peaceful land, the camera focuses on a rabbit, suggesting that they are two Alices in a kind of Wonderland.
The title Paradise Found is based on John Milton's epic poems Paradise Lost and Paradise Regained, which depict conflicts between God and Satan in Christian theology. The plot was intended to include the Archangel Michael and the Garden of Eden, but when director Rob Tapert said they needed a bottle show (5 days filming instead of 9 days) they cut it down severely.
As Xena is writing her letter, you can see her use the boustrophedon form of writing. While the characters written may not be correct, the Greeks wrote from left to right, then right to left. Between 1000 BCE and 500 BCE, the direction of writing changed from right-to-left, to zigzagging, to the modern form of left-to-right.